<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:464bceda-2c56-4608-b96d-246a931353e0,g:f41478e1-f165-4f06-8be6-ea173f534831-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="glpi-20221231.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ConsolidatedBalanceSheets" xlink:type="extended" id="i8798bbc63d774efbbdf42064f4b96225_ConsolidatedBalanceSheets">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_aa21376d-6b3c-4cc4-b0ba-41bd3f36656d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_aa21376d-6b3c-4cc4-b0ba-41bd3f36656d" xlink:to="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_4140d634-da3f-4620-a848-95cf58d3eb3a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_4140d634-da3f-4620-a848-95cf58d3eb3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentInLease_9bc5c476-6bce-4472-aad0-045dd6970a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetInvestmentInLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_NetInvestmentInLease_9bc5c476-6bce-4472-aad0-045dd6970a0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_d49c120e-fd6b-4aea-9a7c-969052e62f7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_d49c120e-fd6b-4aea-9a7c-969052e62f7b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_5755cec6-11ed-4390-846b-231f3dc72834" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_5755cec6-11ed-4390-846b-231f3dc72834" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_dc0fc3e5-fca8-47bf-835e-aca9bb38d5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_dc0fc3e5-fca8-47bf-835e-aca9bb38d5e8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_69442307-aada-4377-b182-0c370ee249a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_OtherAssets_69442307-aada-4377-b182-0c370ee249a9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_766dd549-fc57-4255-a4d6-2dc860db6ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_def7dcb7-6f6e-4221-b94b-4c5eab765a38" xlink:to="loc_us-gaap_Assets_766dd549-fc57-4255-a4d6-2dc860db6ab0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_aa21376d-6b3c-4cc4-b0ba-41bd3f36656d" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_71cf02c7-d6b5-4440-87ea-584e97d655b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_71cf02c7-d6b5-4440-87ea-584e97d655b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_478d1a98-672a-4f5b-9c2a-95b51efca629" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_478d1a98-672a-4f5b-9c2a-95b51efca629" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent_22c09687-8c60-4e69-80f5-26c7a2d9b9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent_22c09687-8c60-4e69-80f5-26c7a2d9b9c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_fa0f3699-9484-4496-9c22-7fd6517a60f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_OperatingLeaseLiability_fa0f3699-9484-4496-9c22-7fd6517a60f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_c21005a4-ab22-430b-8963-318b890c7db0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_FinanceLeaseLiability_c21005a4-ab22-430b-8963-318b890c7db0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_1bf4144e-9871-42df-af8d-8e9b0596080b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_LongTermDebt_1bf4144e-9871-42df-af8d-8e9b0596080b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_a7153ac3-bd16-44fd-b9cb-ac812ebc3129" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_ContractWithCustomerLiability_a7153ac3-bd16-44fd-b9cb-ac812ebc3129" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_5c2c2be7-cb4c-4bd2-8ef3-db2c9e746993" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_OtherLiabilities_5c2c2be7-cb4c-4bd2-8ef3-db2c9e746993" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_06bb2d02-749e-4dda-909d-db563ce9bf4b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_Liabilities_06bb2d02-749e-4dda-909d-db563ce9bf4b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_321c6003-54fe-4b49-81d1-d2b2a75231c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_CommitmentsAndContingencies_321c6003-54fe-4b49-81d1-d2b2a75231c8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_86dd80e7-1b9a-4520-bf40-879e0fe5a339" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_PreferredStockValue_86dd80e7-1b9a-4520-bf40-879e0fe5a339" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_29a1e38f-a305-46c7-bfc2-e6a114cf7ef1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_CommonStockValue_29a1e38f-a305-46c7-bfc2-e6a114cf7ef1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_a0b14b56-2769-4943-bf67-f1f5b4396c58" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_a0b14b56-2769-4943-bf67-f1f5b4396c58" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_729ea9e1-bf2e-4921-af58-9cc33a05e15f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_729ea9e1-bf2e-4921-af58-9cc33a05e15f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_783bd614-5349-493a-a5cd-9e0003c6e476" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_StockholdersEquity_783bd614-5349-493a-a5cd-9e0003c6e476" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestInOperatingPartnerships_ac7a2780-963d-4b56-9886-9c90fa2d37dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestInOperatingPartnerships"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_MinorityInterestInOperatingPartnerships_ac7a2780-963d-4b56-9886-9c90fa2d37dd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0c7bbe23-086a-46c8-adea-086e06f0035e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_b64a9cec-5194-49f9-994d-9fecb4a009f4" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0c7bbe23-086a-46c8-adea-086e06f0035e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_6716e0d6-6dc6-472a-a0bf-866152954477" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_986958b5-aa81-4b00-ad6c-6281dd719ffb" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_6716e0d6-6dc6-472a-a0bf-866152954477" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOwnershipInterestsUnitsIssued_c7e1e337-02f3-421a-9631-c347b6c3f56f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOwnershipInterestsUnitsIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_aa21376d-6b3c-4cc4-b0ba-41bd3f36656d" xlink:to="loc_us-gaap_OtherOwnershipInterestsUnitsIssued_c7e1e337-02f3-421a-9631-c347b6c3f56f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_55ba9ad5-b9d3-4625-a973-2b14deff118e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_aa21376d-6b3c-4cc4-b0ba-41bd3f36656d" xlink:to="loc_us-gaap_StatementTable_55ba9ad5-b9d3-4625-a973-2b14deff118e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ddde621b-1fe0-464f-a1fd-59f073dcbf5b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_55ba9ad5-b9d3-4625-a973-2b14deff118e" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ddde621b-1fe0-464f-a1fd-59f073dcbf5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ddde621b-1fe0-464f-a1fd-59f073dcbf5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ddde621b-1fe0-464f-a1fd-59f073dcbf5b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ddde621b-1fe0-464f-a1fd-59f073dcbf5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7bb15485-d61a-40b8-a1d3-2b3e70f6a33c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ddde621b-1fe0-464f-a1fd-59f073dcbf5b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7bb15485-d61a-40b8-a1d3-2b3e70f6a33c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_ef9e439b-a84d-4aa1-b7c2-f5fb8bb9476a" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7bb15485-d61a-40b8-a1d3-2b3e70f6a33c" xlink:to="loc_glpi_TropicanaLasVegasMember_ef9e439b-a84d-4aa1-b7c2-f5fb8bb9476a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="glpi-20221231.xsd#ConsolidatedStatementsofIncome"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ConsolidatedStatementsofIncome" xlink:type="extended" id="ibbec312ce685415ab018e537836ac53f_ConsolidatedStatementsofIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_cb5af0b9-e24e-4566-ae16-f98f2978523d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseRevenue_04b9f46d-a6b0-43ff-9545-746e5445a0de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesTypeLeaseRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_cb5af0b9-e24e-4566-ae16-f98f2978523d" xlink:to="loc_us-gaap_SalesTypeLeaseRevenue_04b9f46d-a6b0-43ff-9545-746e5445a0de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfRealEstate_859229bb-eb3a-46b3-9d9f-d9a411b4eb39" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfRealEstate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_cb5af0b9-e24e-4566-ae16-f98f2978523d" xlink:to="loc_us-gaap_ImpairmentOfRealEstate_859229bb-eb3a-46b3-9d9f-d9a411b4eb39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_4d635c14-8136-4d3a-af59-cfeaa843861a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_cb5af0b9-e24e-4566-ae16-f98f2978523d" xlink:to="loc_us-gaap_StatementTable_4d635c14-8136-4d3a-af59-cfeaa843861a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4d635c14-8136-4d3a-af59-cfeaa843861a" xlink:to="loc_srt_ProductOrServiceAxis_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea" xlink:to="loc_srt_ProductsAndServicesDomain_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_27978cb3-8b60-4ea8-ac0e-1a580152813a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f1f4c00c-e022-4da7-b44a-6559e9bbd1ea" xlink:to="loc_srt_ProductsAndServicesDomain_27978cb3-8b60-4ea8-ac0e-1a580152813a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateMember_e4eba553-633d-49f0-af9a-b7a01554d240" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_27978cb3-8b60-4ea8-ac0e-1a580152813a" xlink:to="loc_us-gaap_RealEstateMember_e4eba553-633d-49f0-af9a-b7a01554d240" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="simple" xlink:href="glpi-20221231.xsd#ConsolidatedStatementsofChangesinShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="extended" id="i40e693374bfa4489bbae90c767e5a833_ConsolidatedStatementsofChangesinShareholdersEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_ad03790b-4a56-4964-a94f-8143137d0066" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_ad03790b-4a56-4964-a94f-8143137d0066" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_799f08f7-b857-4a14-a87f-c390cd726da0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_CommonStockSharesIssued_799f08f7-b857-4a14-a87f-c390cd726da0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_8001fe18-0805-48bf-8d3d-de8a535b5acd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockholdersEquity_8001fe18-0805-48bf-8d3d-de8a535b5acd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_a25f9776-2801-44bb-9c63-82a43900a591" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_a25f9776-2801-44bb-9c63-82a43900a591" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_9e8895d6-2ede-4f56-a2b8-e56ca381ded9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_9e8895d6-2ede-4f56-a2b8-e56ca381ded9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9df70e6c-47c5-4784-932c-6a058c805e79" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9df70e6c-47c5-4784-932c-6a058c805e79" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_2a9307f9-3740-4649-b71b-dd8898204d54" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_2a9307f9-3740-4649-b71b-dd8898204d54" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_fb45504f-a937-4a86-9ce0-a4e60271da83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_fb45504f-a937-4a86-9ce0-a4e60271da83" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_4f91b26c-8dd7-4bb9-955a-401d12862def" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_DividendsCommonStockCash_4f91b26c-8dd7-4bb9-955a-401d12862def" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsShares_b770a2ca-9d47-4f82-b49d-2daca6d5fd8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_CommonStockDividendsShares_b770a2ca-9d47-4f82-b49d-2daca6d5fd8f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_11bb679e-f777-47c7-8a0d-45113f785430" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_Dividends_11bb679e-f777-47c7-8a0d-45113f785430" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_7e8ffa14-a30b-4690-8014-a67012cc25e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_7e8ffa14-a30b-4690-8014-a67012cc25e9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_3d8b4a99-e84c-458e-bbe1-5ef75ac9b005" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_3d8b4a99-e84c-458e-bbe1-5ef75ac9b005" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_ff9a4047-4c8a-47cc-b3b3-ae47f936a5aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_ProfitLoss_ff9a4047-4c8a-47cc-b3b3-ae47f936a5aa" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0fb75d49-6e50-4539-9ec5-40761cceb09a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_71b50c78-294a-48fa-ba9a-eb59410cc849" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0fb75d49-6e50-4539-9ec5-40761cceb09a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d058d8f4-dd7a-4c76-a433-64a965ca86f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_a72b6a92-215a-4ee5-b96f-1c51057db180" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_b86ceced-fc51-4c78-ac82-f58b6023ad03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_ad03790b-4a56-4964-a94f-8143137d0066" xlink:to="loc_us-gaap_StatementTable_b86ceced-fc51-4c78-ac82-f58b6023ad03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1ccb249d-bb41-4d67-a119-d2399d19a27a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_b86ceced-fc51-4c78-ac82-f58b6023ad03" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1ccb249d-bb41-4d67-a119-d2399d19a27a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_1ccb249d-bb41-4d67-a119-d2399d19a27a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1ccb249d-bb41-4d67-a119-d2399d19a27a" xlink:to="loc_us-gaap_EquityComponentDomain_1ccb249d-bb41-4d67-a119-d2399d19a27a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1ccb249d-bb41-4d67-a119-d2399d19a27a" xlink:to="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_011cbbec-2d10-4ca4-b59d-87b8ab80290c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:to="loc_us-gaap_CommonStockMember_011cbbec-2d10-4ca4-b59d-87b8ab80290c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_ccc48571-9caf-4455-b77b-33c188c0c083" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_ccc48571-9caf-4455-b77b-33c188c0c083" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_c7c39e8d-9b8b-4fc0-ba5e-73aadfa20102" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:to="loc_us-gaap_RetainedEarningsMember_c7c39e8d-9b8b-4fc0-ba5e-73aadfa20102" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_3f58f4c4-9b27-405c-9ba8-633b9e1b5ea3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_fb5cad5e-fae3-4e93-b4df-1de56ac760f0" xlink:to="loc_us-gaap_NoncontrollingInterestMember_3f58f4c4-9b27-405c-9ba8-633b9e1b5ea3" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/BusinessandBasisofPresentationNarrativeDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#BusinessandBasisofPresentationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/BusinessandBasisofPresentationNarrativeDetails" xlink:type="extended" id="i20351cf24b2c4f2189a187fcf8874f74_BusinessandBasisofPresentationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:href="glpi-20221231.xsd#glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_67d8483d-1fe9-4738-9465-87ae132cef2f" xlink:href="glpi-20221231.xsd#glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_67d8483d-1fe9-4738-9465-87ae132cef2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRealEstateProperties_9b66777a-efec-40c7-b4f2-899e7005c16b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRealEstateProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_9b66777a-efec-40c7-b4f2-899e7005c16b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_62296b98-d8f9-4e41-82a8-6ae189846c52" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_62296b98-d8f9-4e41-82a8-6ae189846c52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_d1aac93d-4779-4007-bed3-cfec3866c6c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AreaOfRealEstateProperty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_d1aac93d-4779-4007-bed3-cfec3866c6c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Realestateoccupancypercentage_7005edbe-3aec-40cf-8c88-c415352fd101" xlink:href="glpi-20221231.xsd#glpi_Realestateoccupancypercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_Realestateoccupancypercentage_7005edbe-3aec-40cf-8c88-c415352fd101" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetConsiderationTransferred_44ed51f6-736e-4408-a4af-798f8b14ef3f" xlink:href="glpi-20221231.xsd#glpi_AssetConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_AssetConsiderationTransferred_44ed51f6-736e-4408-a4af-798f8b14ef3f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_7ad89a25-d838-4f61-9d94-a4689cb4ff07" xlink:href="glpi-20221231.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_7ad89a25-d838-4f61-9d94-a4689cb4ff07" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_b9ca27a4-9368-4d6e-b076-4dd8b491f6c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_b9ca27a4-9368-4d6e-b076-4dd8b491f6c4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_b101c29a-bd84-4516-9f7d-64f1033ede44" xlink:href="glpi-20221231.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_b101c29a-bd84-4516-9f7d-64f1033ede44" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireFinanceReceivables_f36fdce2-ebe8-4344-baf5-f95524fd337a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireFinanceReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_PaymentsToAcquireFinanceReceivables_f36fdce2-ebe8-4344-baf5-f95524fd337a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_8fb50c4c-abfb-4d47-ade1-be34e3859fc9" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_8fb50c4c-abfb-4d47-ade1-be34e3859fc9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_55d7644a-c2ee-4947-8ba3-ce61680da4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_55d7644a-c2ee-4947-8ba3-ce61680da4dc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_117240ec-529f-447e-a080-b6f1acc29ecb" xlink:href="glpi-20221231.xsd#glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_117240ec-529f-447e-a080-b6f1acc29ecb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_2b807926-fa15-424c-b07f-fbcb60c3a326" xlink:href="glpi-20221231.xsd#glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_2b807926-fa15-424c-b07f-fbcb60c3a326" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesannualrentalescalationpercentage_5a551790-32b9-47ff-81c9-b5c544ceb9f6" xlink:href="glpi-20221231.xsd#glpi_Operatingleasesannualrentalescalationpercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_Operatingleasesannualrentalescalationpercentage_5a551790-32b9-47ff-81c9-b5c544ceb9f6" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_a7baa09c-8419-432b-993a-dd43b53d49ff" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_a7baa09c-8419-432b-993a-dd43b53d49ff" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_14de2bf2-60c6-405e-b37d-1184294de7ed" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_14de2bf2-60c6-405e-b37d-1184294de7ed" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_c10b3217-1238-42c0-9b6f-064f7f3d7b5b" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_c10b3217-1238-42c0-9b6f-064f7f3d7b5b" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseCashRentReceived_abb61758-83b0-46f4-8f9b-18e7fc4bf545" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_abb61758-83b0-46f4-8f9b-18e7fc4bf545" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_290f4027-4c78-43c1-a7d4-483b8e7d8fd3" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear5AndYear6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_290f4027-4c78-43c1-a7d4-483b8e7d8fd3" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_5aa82c26-f007-4c0a-9f35-68bdc7fb1e69" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear7AndYear8"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_5aa82c26-f007-4c0a-9f35-68bdc7fb1e69" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_d7e88770-cb19-4fe7-a020-f7610a3e371d" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorAfterYear9"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_d7e88770-cb19-4fe7-a020-f7610a3e371d" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_70924fd1-d1e3-4993-8067-a871df5d42ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_70924fd1-d1e3-4993-8067-a871df5d42ea" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_58006a34-e1f4-4c9f-8a89-3d83c38884bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_58006a34-e1f4-4c9f-8a89-3d83c38884bc" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRentCreditsTransferred_b259050c-5868-4a0f-ba0c-578ce235e937" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRentCreditsTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_AssetAcquisitionRentCreditsTransferred_b259050c-5868-4a0f-ba0c-578ce235e937" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyHeldForSale_a449b670-30a3-4d64-8c75-4f2eebe90d92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyHeldForSale_a449b670-30a3-4d64-8c75-4f2eebe90d92" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_b4203d6b-a611-4650-a396-08d838d834c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets_b4203d6b-a611-4650-a396-08d838d834c3" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_d19c8cfd-c401-403b-87db-a99ec7d41f17" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear2Through5"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_d19c8cfd-c401-403b-87db-a99ec7d41f17" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear6And7_6ceb925c-017e-46c2-8ce4-7bc47de1bc40" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear6And7"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear6And7_6ceb925c-017e-46c2-8ce4-7bc47de1bc40" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_84911d4e-1b57-4388-9ef4-0c5001d1ebc3" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear8AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_84911d4e-1b57-4388-9ef4-0c5001d1ebc3" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired_e6f2a94d-605d-4c4a-89b3-43e350298687" xlink:href="glpi-20221231.xsd#glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired_e6f2a94d-605d-4c4a-89b3-43e350298687" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SalesLeasebackTransactionYield_8c415877-4845-401f-b20c-258049269c98" xlink:href="glpi-20221231.xsd#glpi_SalesLeasebackTransactionYield"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_SalesLeasebackTransactionYield_8c415877-4845-401f-b20c-258049269c98" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8e8d9a8d-05bc-45e1-abb6-099a37f9b444" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8e8d9a8d-05bc-45e1-abb6-099a37f9b444" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_e36d3d91-41db-49df-97e1-ccc15ac6c677" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForDepositsOnRealEstateAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_e36d3d91-41db-49df-97e1-ccc15ac6c677" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_8c5f6078-f58b-4a30-b756-9d193ba8e9f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleAndLeasebackTransactionGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_8c5f6078-f58b-4a30-b756-9d193ba8e9f6" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_eaf46f1d-fdb5-4ef5-95e4-8ead23972303" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_eaf46f1d-fdb5-4ef5-95e4-8ead23972303" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_ae390c54-f9a8-476c-a7af-f3fb228b05c4" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_ae390c54-f9a8-476c-a7af-f3fb228b05c4" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_2fdb337e-8ff5-4325-b366-423d4e4d243b" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_2fdb337e-8ff5-4325-b366-423d4e4d243b" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_cf4b1a1f-3643-48f5-ac7d-d20e939e6f90" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_cf4b1a1f-3643-48f5-ac7d-d20e939e6f90" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SalesLeasebackRightOfRefusalAmount_b46e7d2f-24eb-47bf-8f8e-b7b6fa59bb5e" xlink:href="glpi-20221231.xsd#glpi_SalesLeasebackRightOfRefusalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_SalesLeasebackRightOfRefusalAmount_b46e7d2f-24eb-47bf-8f8e-b7b6fa59bb5e" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:href="glpi-20221231.xsd#glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_cd266cb7-b6ea-401f-9f9f-fa7284747f89" xlink:to="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_3f7b8959-d901-40da-aa22-752c01ff262b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_srt_MajorCustomersAxis_3f7b8959-d901-40da-aa22-752c01ff262b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_3f7b8959-d901-40da-aa22-752c01ff262b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_3f7b8959-d901-40da-aa22-752c01ff262b" xlink:to="loc_srt_NameOfMajorCustomerDomain_3f7b8959-d901-40da-aa22-752c01ff262b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_3f7b8959-d901-40da-aa22-752c01ff262b" xlink:to="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingIncMember_f3bef91f-2891-4407-9dd9-0f83bbfc7e9e" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_PennNationalGamingIncMember_f3bef91f-2891-4407-9dd9-0f83bbfc7e9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoResortsInc.Member_edc7ce9e-b135-437d-84f8-f1d773913b29" xlink:href="glpi-20221231.xsd#glpi_EldoradoResortsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_EldoradoResortsInc.Member_edc7ce9e-b135-437d-84f8-f1d773913b29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMember_f5ed52c4-01c2-4bb7-9eb1-e8de83ffa735" xlink:href="glpi-20221231.xsd#glpi_BoydGamingCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_BoydGamingCorporationMember_f5ed52c4-01c2-4bb7-9eb1-e8de83ffa735" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysCorporationMember_c583eb00-afd2-4d03-83c7-b228ba4ecb18" xlink:href="glpi-20221231.xsd#glpi_BallysCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_BallysCorporationMember_c583eb00-afd2-4d03-83c7-b228ba4ecb18" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMember_6c6ba22c-a575-4b70-8b06-d200748997c0" xlink:href="glpi-20221231.xsd#glpi_CasinoQueenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_CasinoQueenMember_6c6ba22c-a575-4b70-8b06-d200748997c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_851d62fd-1f6b-4032-94f0-1a9969a1504a" xlink:href="glpi-20221231.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_TheCordishCompaniesMember_851d62fd-1f6b-4032-94f0-1a9969a1504a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_ce1888e3-94f7-4298-acb9-65e14c74eba2" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_190ab665-a22d-479b-bdf9-dcbdff0abb9e" xlink:to="loc_glpi_BallysMasterLeaseMember_ce1888e3-94f7-4298-acb9-65e14c74eba2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_d97a2670-4d3d-45a0-a391-12992f68a0ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_d97a2670-4d3d-45a0-a391-12992f68a0ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d97a2670-4d3d-45a0-a391-12992f68a0ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d97a2670-4d3d-45a0-a391-12992f68a0ac" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d97a2670-4d3d-45a0-a391-12992f68a0ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d97a2670-4d3d-45a0-a391-12992f68a0ac" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PinnacleEntertainmentInc.Member_0d66c512-3d37-4260-b54b-7eb30a92b7cb" xlink:href="glpi-20221231.xsd#glpi_PinnacleEntertainmentInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_PinnacleEntertainmentInc.Member_0d66c512-3d37-4260-b54b-7eb30a92b7cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PlainridgeParkCasinoMember_5d8715b7-4c66-4fcd-91e9-fd7bebc34d2d" xlink:href="glpi-20221231.xsd#glpi_PlainridgeParkCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_PlainridgeParkCasinoMember_5d8715b7-4c66-4fcd-91e9-fd7bebc34d2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEntertainmentMember_29760cec-6c5e-4dc3-8c7a-6eb96ac482cd" xlink:href="glpi-20221231.xsd#glpi_TropicanaEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_TropicanaEntertainmentMember_29760cec-6c5e-4dc3-8c7a-6eb96ac482cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaEvansvilleMember_64683cb1-333e-4328-8df5-d903dd21d979" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaEvansvilleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_BallysTropicanaEvansvilleMember_64683cb1-333e-4328-8df5-d903dd21d979" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DoverDownsHotelCasinoMember_69a2ccb3-ade2-437b-9d9c-cf4a937dfca9" xlink:href="glpi-20221231.xsd#glpi_DoverDownsHotelCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_DoverDownsHotelCasinoMember_69a2ccb3-ade2-437b-9d9c-cf4a937dfca9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_d3a107d9-e3b4-4e89-a9ab-9f73d3f02a53" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_d3a107d9-e3b4-4e89-a9ab-9f73d3f02a53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_c1aefe86-b253-48ee-9439-fbb06a656430" xlink:href="glpi-20221231.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_c1aefe86-b253-48ee-9439-fbb06a656430" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_bfa7551a-0af1-4ca1-a927-823611b88740" xlink:href="glpi-20221231.xsd#glpi_BallysTivertonCasinoHardrockBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_bfa7551a-0af1-4ca1-a927-823611b88740" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysLincolnMember_549eee06-a639-4947-92fd-014cf87999b5" xlink:href="glpi-20221231.xsd#glpi_BallysLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_BallysLincolnMember_549eee06-a639-4947-92fd-014cf87999b5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaLasVegasMember_4c7267b2-0b7d-4257-8756-31a9338aa4fc" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_BallysTropicanaLasVegasMember_4c7267b2-0b7d-4257-8756-31a9338aa4fc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_db311ec3-e3f0-4713-bbb0-9ad461e19a25" xlink:href="glpi-20221231.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba15fd89-5180-489b-a114-e64b870eb362" xlink:to="loc_glpi_TheCordishCompaniesMember_db311ec3-e3f0-4713-bbb0-9ad461e19a25" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_0aaa362c-52ba-47d9-a035-c8c82aa24c22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_us-gaap_LeaseContractualTermAxis_0aaa362c-52ba-47d9-a035-c8c82aa24c22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_0aaa362c-52ba-47d9-a035-c8c82aa24c22_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_0aaa362c-52ba-47d9-a035-c8c82aa24c22" xlink:to="loc_us-gaap_LeaseContractualTermDomain_0aaa362c-52ba-47d9-a035-c8c82aa24c22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_0aaa362c-52ba-47d9-a035-c8c82aa24c22" xlink:to="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMasterLeaseMember_dffcc7da-d6b3-4c8a-ab8a-38f2b7360e06" xlink:href="glpi-20221231.xsd#glpi_BoydGamingCorporationMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_BoydGamingCorporationMasterLeaseMember_dffcc7da-d6b3-4c8a-ab8a-38f2b7360e06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraParkLeaseMember_d5cbde5c-2e41-45bc-b9b3-b9148c6cfa7d" xlink:href="glpi-20221231.xsd#glpi_BelterraParkLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_BelterraParkLeaseMember_d5cbde5c-2e41-45bc-b9b3-b9148c6cfa7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_91bfebb6-6f4c-4d8c-b1e6-d6beb9f4fca2" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingInc.MeadowsLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_91bfebb6-6f4c-4d8c-b1e6-d6beb9f4fca2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_c23126f9-834e-4bb8-a298-15d605dc1335" xlink:href="glpi-20221231.xsd#glpi_AmendedAndRestatedCaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_c23126f9-834e-4bb8-a298-15d605dc1335" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CaesarsMasterLeaseMember_1fb05064-429d-4428-8cae-6bbb829cbe1d" xlink:href="glpi-20221231.xsd#glpi_CaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_CaesarsMasterLeaseMember_1fb05064-429d-4428-8cae-6bbb829cbe1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumirePlaceLeaseMember_3f5af4cf-b235-4c0c-83d4-6904a3bc6ef6" xlink:href="glpi-20221231.xsd#glpi_LumirePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_LumirePlaceLeaseMember_3f5af4cf-b235-4c0c-83d4-6904a3bc6ef6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_4497f308-1e3a-4359-a908-a8de0a15049c" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_BallysMasterLeaseMember_4497f308-1e3a-4359-a908-a8de0a15049c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownLeaseMember_c7ae5e36-3f8a-4920-b2fb-dc7ef220b2be" xlink:href="glpi-20221231.xsd#glpi_MorgantownLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_MorgantownLeaseMember_c7ae5e36-3f8a-4920-b2fb-dc7ef220b2be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMasterLeaseMember_b1cf90ba-0b8b-4a87-ba87-3025865fc3cc" xlink:href="glpi-20221231.xsd#glpi_CasinoQueenMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_CasinoQueenMasterLeaseMember_b1cf90ba-0b8b-4a87-ba87-3025865fc3cc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_5c96c993-981d-48f9-b9d4-11ca168dfd34" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_5c96c993-981d-48f9-b9d4-11ca168dfd34" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_a9e8b5fa-40b9-483d-98ec-89a50c8e4aa8" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_a9e8b5fa-40b9-483d-98ec-89a50c8e4aa8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceLeaseMember_6aa471f4-5223-43c5-a792-9baf488e98a9" xlink:href="glpi-20221231.xsd#glpi_LumierePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_LumierePlaceLeaseMember_6aa471f4-5223-43c5-a792-9baf488e98a9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_7e3d4757-d242-4ee6-a01f-9b5d1b81a271" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_7e3d4757-d242-4ee6-a01f-9b5d1b81a271" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_02ae10fb-257e-4df6-88b2-af38235f1ba7" xlink:href="glpi-20221231.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_02ae10fb-257e-4df6-88b2-af38235f1ba7" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_f256587a-194c-4205-8075-dc38c77d6862" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseTivertonBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_f256587a-194c-4205-8075-dc38c77d6862" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseLincolnMember_088f7038-357d-42b8-b278-c1cc12e5ecc8" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_BallysMasterLeaseLincolnMember_088f7038-357d-42b8-b278-c1cc12e5ecc8" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_621bd507-e461-4096-b205-4c7316322a53" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_TropicanaLasVegasMember_621bd507-e461-4096-b205-4c7316322a53" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasLeaseMember_f7c26d3d-fd61-48d3-9bc0-f32ebe358c21" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_TropicanaLasVegasLeaseMember_f7c26d3d-fd61-48d3-9bc0-f32ebe358c21" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_c8dde770-d6f1-4a9e-add1-0365ca6dd55f" xlink:href="glpi-20221231.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_PALiveMasterLeaseMember_c8dde770-d6f1-4a9e-add1-0365ca6dd55f" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandAndPALeasesMember_35cadd8d-6235-41e9-a972-358929b2d753" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandAndPALeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_LiveCasinoMarylandAndPALeasesMember_35cadd8d-6235-41e9-a972-358929b2d753" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBatonRougeMember_4fa255d7-865d-4c67-9e5f-af206eda079c" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoBatonRougeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_HollywoodCasinoBatonRougeMember_4fa255d7-865d-4c67-9e5f-af206eda079c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_4cdf908f-6bc7-463b-beed-c13afced0754" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b92a02de-6032-4edf-a422-dd3235571242" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_4cdf908f-6bc7-463b-beed-c13afced0754" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_ec185493-db50-47e9-a06b-4b4c62bab1b4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_srt_CounterpartyNameAxis_ec185493-db50-47e9-a06b-4b4c62bab1b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ec185493-db50-47e9-a06b-4b4c62bab1b4_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_ec185493-db50-47e9-a06b-4b4c62bab1b4" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ec185493-db50-47e9-a06b-4b4c62bab1b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_a35f78ab-4b28-4aa6-8584-606164ea49a9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_ec185493-db50-47e9-a06b-4b4c62bab1b4" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_a35f78ab-4b28-4aa6-8584-606164ea49a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMember_f6bb850e-4b25-4498-bd34-76087fbcda1e" xlink:href="glpi-20221231.xsd#glpi_BoydGamingCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_a35f78ab-4b28-4aa6-8584-606164ea49a9" xlink:to="loc_glpi_BoydGamingCorporationMember_f6bb850e-4b25-4498-bd34-76087fbcda1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoResortsInc.Member_240906a0-90fc-4556-98dd-4df773c6012f" xlink:href="glpi-20221231.xsd#glpi_EldoradoResortsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_a35f78ab-4b28-4aa6-8584-606164ea49a9" xlink:to="loc_glpi_EldoradoResortsInc.Member_240906a0-90fc-4556-98dd-4df773c6012f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ec9de075-11f4-40dd-8389-cd1f193581d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ec9de075-11f4-40dd-8389-cd1f193581d7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_ec9de075-11f4-40dd-8389-cd1f193581d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ec9de075-11f4-40dd-8389-cd1f193581d7" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_ec9de075-11f4-40dd-8389-cd1f193581d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0c9e52b8-79c3-4eab-979e-11374de63b6c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ec9de075-11f4-40dd-8389-cd1f193581d7" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0c9e52b8-79c3-4eab-979e-11374de63b6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateLoanMember_a63f8893-e14e-46dc-8186-aaf62ef9777d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0c9e52b8-79c3-4eab-979e-11374de63b6c" xlink:to="loc_us-gaap_RealEstateLoanMember_a63f8893-e14e-46dc-8186-aaf62ef9777d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4076d14e-83d9-4e9a-968d-2ef4f00365d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f7d0bc25-9f1b-45a1-af70-e7fd19be7afb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4076d14e-83d9-4e9a-968d-2ef4f00365d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_86918438-553a-4768-9e47-82e22bda83eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4076d14e-83d9-4e9a-968d-2ef4f00365d0" xlink:to="loc_us-gaap_LandMember_86918438-553a-4768-9e47-82e22bda83eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_24d4ff5c-3244-4d64-8382-ca02bc00c64b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4076d14e-83d9-4e9a-968d-2ef4f00365d0" xlink:to="loc_us-gaap_BuildingMember_24d4ff5c-3244-4d64-8382-ca02bc00c64b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_a48dc729-5915-4686-b497-ad68116e6027" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_glpi_TriggeringEventAxis_a48dc729-5915-4686-b497-ad68116e6027" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_a48dc729-5915-4686-b497-ad68116e6027_default" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_a48dc729-5915-4686-b497-ad68116e6027" xlink:to="loc_glpi_TriggeringEventDomain_a48dc729-5915-4686-b497-ad68116e6027_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_301f631e-17a4-4b4b-9828-00a11d48099c" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_a48dc729-5915-4686-b497-ad68116e6027" xlink:to="loc_glpi_TriggeringEventDomain_301f631e-17a4-4b4b-9828-00a11d48099c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBatonRougeMember_922b8cfb-60d4-436e-94f8-d2267b899f0b" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoBatonRougeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_301f631e-17a4-4b4b-9828-00a11d48099c" xlink:to="loc_glpi_HollywoodCasinoBatonRougeMember_922b8cfb-60d4-436e-94f8-d2267b899f0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_886055f2-c427-4ece-bcf0-5487442bf428" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_301f631e-17a4-4b4b-9828-00a11d48099c" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_886055f2-c427-4ece-bcf0-5487442bf428" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f7d3fbc2-9201-4ead-9af7-00394648c773" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_srt_RangeAxis_f7d3fbc2-9201-4ead-9af7-00394648c773" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f7d3fbc2-9201-4ead-9af7-00394648c773_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f7d3fbc2-9201-4ead-9af7-00394648c773" xlink:to="loc_srt_RangeMember_f7d3fbc2-9201-4ead-9af7-00394648c773_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a2cfeea1-c291-48bd-b1bf-40397e2b287a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f7d3fbc2-9201-4ead-9af7-00394648c773" xlink:to="loc_srt_RangeMember_a2cfeea1-c291-48bd-b1bf-40397e2b287a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_62726966-b26f-4b29-9627-6df093e309a0" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a2cfeea1-c291-48bd-b1bf-40397e2b287a" xlink:to="loc_srt_MaximumMember_62726966-b26f-4b29-9627-6df093e309a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_a4cd0256-fe58-4bc9-8a54-73fc081d04e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_8381c518-bb39-4de6-81e1-989bbefdaf3f" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_a4cd0256-fe58-4bc9-8a54-73fc081d04e4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_a4cd0256-fe58-4bc9-8a54-73fc081d04e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_a4cd0256-fe58-4bc9-8a54-73fc081d04e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_a4cd0256-fe58-4bc9-8a54-73fc081d04e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_ec6c4d83-7b95-45a9-ada5-4701fc46c29b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_a4cd0256-fe58-4bc9-8a54-73fc081d04e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_ec6c4d83-7b95-45a9-ada5-4701fc46c29b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_9d9d41ad-2a5f-4c2c-a377-e6984a034a06" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_ec6c4d83-7b95-45a9-ada5-4701fc46c29b" xlink:to="loc_us-gaap_SubsequentEventMember_9d9d41ad-2a5f-4c2c-a377-e6984a034a06" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesRealEstateInvestmentsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#SummaryofSignificantAccountingPoliciesRealEstateInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesRealEstateInvestmentsDetails" xlink:type="extended" id="ia100cdb73db84e898de075b1126806ff_SummaryofSignificantAccountingPoliciesRealEstateInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2926bdb2-bd9d-4e7b-a131-a9d9698dc18e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1_6424b6c5-ce16-451f-a3eb-aa0209c5930e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2926bdb2-bd9d-4e7b-a131-a9d9698dc18e" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1_6424b6c5-ce16-451f-a3eb-aa0209c5930e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6b3332bb-3b82-4e56-b95e-0926a8b7ae82" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2926bdb2-bd9d-4e7b-a131-a9d9698dc18e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6b3332bb-3b82-4e56-b95e-0926a8b7ae82" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_eaea2835-af10-4984-873e-d4d498c33b6c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6b3332bb-3b82-4e56-b95e-0926a8b7ae82" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_eaea2835-af10-4984-873e-d4d498c33b6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_eaea2835-af10-4984-873e-d4d498c33b6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_eaea2835-af10-4984-873e-d4d498c33b6c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_eaea2835-af10-4984-873e-d4d498c33b6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6043b8a8-4168-4843-ae44-1d556e8ac6d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_eaea2835-af10-4984-873e-d4d498c33b6c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6043b8a8-4168-4843-ae44-1d556e8ac6d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_c7c75538-b0c6-4346-b02a-96e54dcd9a3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6043b8a8-4168-4843-ae44-1d556e8ac6d8" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_c7c75538-b0c6-4346-b02a-96e54dcd9a3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2d892b3c-956a-426e-be5d-3014b2eb47df" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6b3332bb-3b82-4e56-b95e-0926a8b7ae82" xlink:to="loc_srt_RangeAxis_2d892b3c-956a-426e-be5d-3014b2eb47df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2d892b3c-956a-426e-be5d-3014b2eb47df_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2d892b3c-956a-426e-be5d-3014b2eb47df" xlink:to="loc_srt_RangeMember_2d892b3c-956a-426e-be5d-3014b2eb47df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c28af6f7-ed78-441a-8a5e-8ac84d32f58b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2d892b3c-956a-426e-be5d-3014b2eb47df" xlink:to="loc_srt_RangeMember_c28af6f7-ed78-441a-8a5e-8ac84d32f58b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_0b0fbcac-21e9-4b39-8763-1c57e28bd173" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c28af6f7-ed78-441a-8a5e-8ac84d32f58b" xlink:to="loc_srt_MinimumMember_0b0fbcac-21e9-4b39-8763-1c57e28bd173" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e49ecf7d-768a-4f23-82bd-0f6bec46dad4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c28af6f7-ed78-441a-8a5e-8ac84d32f58b" xlink:to="loc_srt_MaximumMember_e49ecf7d-768a-4f23-82bd-0f6bec46dad4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentUsedinOperationsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#SummaryofSignificantAccountingPoliciesPropertyandEquipmentUsedinOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentUsedinOperationsDetails" xlink:type="extended" id="i606ba967cc634073943d7855d00b694f_SummaryofSignificantAccountingPoliciesPropertyandEquipmentUsedinOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4d78defd-40cd-4761-9bb1-8b82269aa6dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_51681388-0152-4614-a8be-efd2788b2fc4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4d78defd-40cd-4761-9bb1-8b82269aa6dd" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_51681388-0152-4614-a8be-efd2788b2fc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PeriodforWhichEntityWillNotbePermittedtoQualifyforTaxTreatmentasRealEstateInvestmentTrustinCaseofFailuretoQualifyasREITinanyTaxableYear_66a05c00-fbdf-41a0-911e-f2ea042457cf" xlink:href="glpi-20221231.xsd#glpi_PeriodforWhichEntityWillNotbePermittedtoQualifyforTaxTreatmentasRealEstateInvestmentTrustinCaseofFailuretoQualifyasREITinanyTaxableYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4d78defd-40cd-4761-9bb1-8b82269aa6dd" xlink:to="loc_glpi_PeriodforWhichEntityWillNotbePermittedtoQualifyforTaxTreatmentasRealEstateInvestmentTrustinCaseofFailuretoQualifyasREITinanyTaxableYear_66a05c00-fbdf-41a0-911e-f2ea042457cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2a054fdc-a42d-438f-872e-9dc2c97e2a47" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4d78defd-40cd-4761-9bb1-8b82269aa6dd" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2a054fdc-a42d-438f-872e-9dc2c97e2a47" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_90509109-bfde-4a5b-a941-87fa5afaf9ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2a054fdc-a42d-438f-872e-9dc2c97e2a47" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_90509109-bfde-4a5b-a941-87fa5afaf9ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_90509109-bfde-4a5b-a941-87fa5afaf9ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_90509109-bfde-4a5b-a941-87fa5afaf9ea" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_90509109-bfde-4a5b-a941-87fa5afaf9ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c37f6940-d48f-451a-98ce-bb9f048970a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_90509109-bfde-4a5b-a941-87fa5afaf9ea" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c37f6940-d48f-451a-98ce-bb9f048970a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_52304d91-03bd-49da-9f9f-5f1140ec00dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c37f6940-d48f-451a-98ce-bb9f048970a4" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_52304d91-03bd-49da-9f9f-5f1140ec00dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_e8160a81-eab5-414a-8770-3d50fd8a0309" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2a054fdc-a42d-438f-872e-9dc2c97e2a47" xlink:to="loc_srt_RangeAxis_e8160a81-eab5-414a-8770-3d50fd8a0309" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e8160a81-eab5-414a-8770-3d50fd8a0309_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_e8160a81-eab5-414a-8770-3d50fd8a0309" xlink:to="loc_srt_RangeMember_e8160a81-eab5-414a-8770-3d50fd8a0309_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_fab67029-cfda-4c03-adab-71092b6f0c5c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_e8160a81-eab5-414a-8770-3d50fd8a0309" xlink:to="loc_srt_RangeMember_fab67029-cfda-4c03-adab-71092b6f0c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_0719081a-4cfa-4baa-be8b-b46d365afdd1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_fab67029-cfda-4c03-adab-71092b6f0c5c" xlink:to="loc_srt_MinimumMember_0719081a-4cfa-4baa-be8b-b46d365afdd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_cc9aa44b-f12f-4f4d-b520-14a9e67b3169" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_fab67029-cfda-4c03-adab-71092b6f0c5c" xlink:to="loc_srt_MaximumMember_cc9aa44b-f12f-4f4d-b520-14a9e67b3169" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#SummaryofSignificantAccountingPoliciesCashandCashEquivalentsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SummaryofSignificantAccountingPoliciesCashandCashEquivalentsDetails" xlink:type="extended" id="i1fcf90ce1ab24f58bb810f06daa73645_SummaryofSignificantAccountingPoliciesCashandCashEquivalentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_790a689b-029c-41e8-9a69-abb075d55e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_InvestmentMaturityforCashEquivalentClassification_85a382f3-9d78-4484-9376-2d5d3fbcc6ff" xlink:href="glpi-20221231.xsd#glpi_InvestmentMaturityforCashEquivalentClassification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_790a689b-029c-41e8-9a69-abb075d55e0a" xlink:to="loc_glpi_InvestmentMaturityforCashEquivalentClassification_85a382f3-9d78-4484-9376-2d5d3fbcc6ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_1933e757-05da-4707-bd0a-2a220d019516" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForDepositsOnRealEstateAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_790a689b-029c-41e8-9a69-abb075d55e0a" xlink:to="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_1933e757-05da-4707-bd0a-2a220d019516" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_8fdbc174-8b4e-431c-a499-a3b2b6661f21" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_790a689b-029c-41e8-9a69-abb075d55e0a" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_8fdbc174-8b4e-431c-a499-a3b2b6661f21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_265c7753-03ee-4b27-9ce3-dc5755ba8cea" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_8fdbc174-8b4e-431c-a499-a3b2b6661f21" xlink:to="loc_srt_RangeAxis_265c7753-03ee-4b27-9ce3-dc5755ba8cea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_265c7753-03ee-4b27-9ce3-dc5755ba8cea_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_265c7753-03ee-4b27-9ce3-dc5755ba8cea" xlink:to="loc_srt_RangeMember_265c7753-03ee-4b27-9ce3-dc5755ba8cea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f8a1fd0f-78dd-4207-b855-56d407400d99" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_265c7753-03ee-4b27-9ce3-dc5755ba8cea" xlink:to="loc_srt_RangeMember_f8a1fd0f-78dd-4207-b855-56d407400d99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_f0449cd6-4e4f-4938-8f89-2ccba7dc48ab" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f8a1fd0f-78dd-4207-b855-56d407400d99" xlink:to="loc_srt_MaximumMember_f0449cd6-4e4f-4938-8f89-2ccba7dc48ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_d02ed42f-9890-471b-a3d5-ef940b530063" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_8fdbc174-8b4e-431c-a499-a3b2b6661f21" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_d02ed42f-9890-471b-a3d5-ef940b530063" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_d02ed42f-9890-471b-a3d5-ef940b530063_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_d02ed42f-9890-471b-a3d5-ef940b530063" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_d02ed42f-9890-471b-a3d5-ef940b530063_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_900d6d2b-7411-4af7-aef5-572c37a0dc13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_d02ed42f-9890-471b-a3d5-ef940b530063" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_900d6d2b-7411-4af7-aef5-572c37a0dc13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_54515d14-8d9c-4ac5-b50b-77466fc29850" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_900d6d2b-7411-4af7-aef5-572c37a0dc13" xlink:to="loc_us-gaap_SubsequentEventMember_54515d14-8d9c-4ac5-b50b-77466fc29850" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RealEstateInvestmentsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#RealEstateInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RealEstateInvestmentsDetails" xlink:type="extended" id="i7812be72a96a4e58958a526507ac3500_RealEstateInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstatePropertiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRealEstateProperties_89e768ac-7573-4e28-ab0f-a58ac721a9a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRealEstateProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_89e768ac-7573-4e28-ab0f-a58ac721a9a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f7043634-adb8-4dbd-b0de-cba6930ef65b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAtCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f7043634-adb8-4dbd-b0de-cba6930ef65b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressGross_ef8bf007-a4e8-4a4c-b769-47c1a8515b8e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConstructionInProgressGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_ConstructionInProgressGross_ef8bf007-a4e8-4a4c-b769-47c1a8515b8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_a169520e-2c7f-4009-861b-1515289ae025" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_a169520e-2c7f-4009-861b-1515289ae025" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_b1fa3d25-85bc-4e67-a6ae-b6d009d37f25" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_b1fa3d25-85bc-4e67-a6ae-b6d009d37f25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_177f36b8-27dd-46f9-9570-7b82b10ed003" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRealEstatePropertiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems_2409c11a-b013-4824-bccf-711cfa8d9356" xlink:to="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_177f36b8-27dd-46f9-9570-7b82b10ed003" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_fae4eb76-b47e-4d8e-997f-d07abc93dadb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_177f36b8-27dd-46f9-9570-7b82b10ed003" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_fae4eb76-b47e-4d8e-997f-d07abc93dadb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_fae4eb76-b47e-4d8e-997f-d07abc93dadb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_fae4eb76-b47e-4d8e-997f-d07abc93dadb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_fae4eb76-b47e-4d8e-997f-d07abc93dadb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1ba7db1f-14a4-443a-bf55-90e51a5e567d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_fae4eb76-b47e-4d8e-997f-d07abc93dadb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1ba7db1f-14a4-443a-bf55-90e51a5e567d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_854b6612-122f-429c-b8a4-ca102115a478" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandAndLandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1ba7db1f-14a4-443a-bf55-90e51a5e567d" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_854b6612-122f-429c-b8a4-ca102115a478" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_e242d757-ebb6-4fea-8e50-651ec7fec308" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1ba7db1f-14a4-443a-bf55-90e51a5e567d" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_e242d757-ebb6-4fea-8e50-651ec7fec308" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AssetsHeldforSaleDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#AssetsHeldforSaleDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AssetsHeldforSaleDetails" xlink:type="extended" id="id15d50a527cb499f8618ee9a524666f3_AssetsHeldforSaleDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongLivedAssetsHeldForSaleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_9e5b0a81-16de-42a7-9144-6d1dcaea5d97" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_9e5b0a81-16de-42a7-9144-6d1dcaea5d97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_a5b10260-b774-4a0d-9280-a39a96837753" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleAndLeasebackTransactionGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_a5b10260-b774-4a0d-9280-a39a96837753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_a52a9d78-6295-4e02-9abd-311edcd08c71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_a52a9d78-6295-4e02-9abd-311edcd08c71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived_39d3b24b-8248-41da-9e9c-0f79215e81ad" xlink:href="glpi-20221231.xsd#glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived_39d3b24b-8248-41da-9e9c-0f79215e81ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_9672f56c-078c-41d9-8de6-e472f39d2616" xlink:href="glpi-20221231.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_9672f56c-078c-41d9-8de6-e472f39d2616" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_c701160a-7ab2-4fef-bff8-257c5bf759dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_c701160a-7ab2-4fef-bff8-257c5bf759dc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_f91da4da-01fd-466e-94d7-a9b08da268f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_f91da4da-01fd-466e-94d7-a9b08da268f6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_fbdd190d-192b-4f5a-a0b0-3c09bcda294d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_1a0622e5-8e93-48b2-aa99-e9d31869dbce" xlink:to="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_fbdd190d-192b-4f5a-a0b0-3c09bcda294d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_74b10115-4f41-493f-ad59-1e642c2e246a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_fbdd190d-192b-4f5a-a0b0-3c09bcda294d" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_74b10115-4f41-493f-ad59-1e642c2e246a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_74b10115-4f41-493f-ad59-1e642c2e246a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_74b10115-4f41-493f-ad59-1e642c2e246a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_74b10115-4f41-493f-ad59-1e642c2e246a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_62f3806c-a1ae-49fb-8239-1bce4ecb2535" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_74b10115-4f41-493f-ad59-1e642c2e246a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_62f3806c-a1ae-49fb-8239-1bce4ecb2535" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DoverDownsHotelCasinoMember_91fb8def-cfb1-40f9-a021-decaf3201999" xlink:href="glpi-20221231.xsd#glpi_DoverDownsHotelCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_62f3806c-a1ae-49fb-8239-1bce4ecb2535" xlink:to="loc_glpi_DoverDownsHotelCasinoMember_91fb8def-cfb1-40f9-a021-decaf3201999" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaLasVegasMember_0a047abb-7fd7-45ec-93c9-17702aac6c04" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_62f3806c-a1ae-49fb-8239-1bce4ecb2535" xlink:to="loc_glpi_BallysTropicanaLasVegasMember_0a047abb-7fd7-45ec-93c9-17702aac6c04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_ba7e835c-c893-45be-a676-bb625da51657" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_fbdd190d-192b-4f5a-a0b0-3c09bcda294d" xlink:to="loc_us-gaap_LeaseContractualTermAxis_ba7e835c-c893-45be-a676-bb625da51657" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_ba7e835c-c893-45be-a676-bb625da51657_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ba7e835c-c893-45be-a676-bb625da51657" xlink:to="loc_us-gaap_LeaseContractualTermDomain_ba7e835c-c893-45be-a676-bb625da51657_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ba7e835c-c893-45be-a676-bb625da51657" xlink:to="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_6caaa9d9-045e-43b0-bf1c-827bfc7b1cc1" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_6caaa9d9-045e-43b0-bf1c-827bfc7b1cc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBatonRougeMember_6e5dc082-8df7-49fa-9baf-5a295fbe7aa9" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoBatonRougeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:to="loc_glpi_HollywoodCasinoBatonRougeMember_6e5dc082-8df7-49fa-9baf-5a295fbe7aa9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TwinRiverMasterLeaseMember_6579f082-1312-40cf-ae82-59e7fa463d6a" xlink:href="glpi-20221231.xsd#glpi_TwinRiverMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:to="loc_glpi_TwinRiverMasterLeaseMember_6579f082-1312-40cf-ae82-59e7fa463d6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_a9df3150-72a3-4471-a6bb-f7e5abe576d9" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_d506d29a-7e55-45dc-9878-929ccd45dfa2" xlink:to="loc_glpi_TropicanaLasVegasMember_a9df3150-72a3-4471-a6bb-f7e5abe576d9" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AcquisitionsNarrativeDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#AcquisitionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AcquisitionsNarrativeDetails" xlink:type="extended" id="i5771dbb8d7a34fa9878f7bfc7cfb9f36_AcquisitionsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_797e903f-6a50-444c-9cd5-0e343f6f9875" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_797e903f-6a50-444c-9cd5-0e343f6f9875" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_200c0914-3df4-4158-a5cd-7fd593ce9237" xlink:href="glpi-20221231.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_200c0914-3df4-4158-a5cd-7fd593ce9237" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived_41bf40b8-8d8a-40b1-a901-eec4031232d8" xlink:href="glpi-20221231.xsd#glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_glpi_LessorOperatingLeaseAnnualPaymentsToBeReceived_41bf40b8-8d8a-40b1-a901-eec4031232d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1b443eac-01b3-4d74-a33a-93d100fb6c46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1b443eac-01b3-4d74-a33a-93d100fb6c46" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesannualrentalescalationpercentage_3c3a01c5-4fe2-4b21-af59-c7df44f976b1" xlink:href="glpi-20221231.xsd#glpi_Operatingleasesannualrentalescalationpercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_glpi_Operatingleasesannualrentalescalationpercentage_3c3a01c5-4fe2-4b21-af59-c7df44f976b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_9d5e3ffe-9ff2-4da3-b931-c34af3def176" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_FinanceLeaseLiability_9d5e3ffe-9ff2-4da3-b931-c34af3def176" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_cb6c8d16-152e-4063-b5d6-10d7a6ad4040" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_cb6c8d16-152e-4063-b5d6-10d7a6ad4040" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRentCreditsTransferred_60862917-08d2-4d6b-8726-a049db114ba7" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRentCreditsTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_glpi_AssetAcquisitionRentCreditsTransferred_60862917-08d2-4d6b-8726-a049db114ba7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_88a0f301-013c-4e75-8bbe-028ccac34d03" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_88a0f301-013c-4e75-8bbe-028ccac34d03" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_7c4a7a28-2210-464e-adf9-25ca944e2cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForDepositsOnRealEstateAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_7c4a7a28-2210-464e-adf9-25ca944e2cd9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_951f25ad-597c-4f51-b428-70ef9c2d7a56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_951f25ad-597c-4f51-b428-70ef9c2d7a56" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_2cda04a0-4df7-4705-8412-68a49d98cb46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_2cda04a0-4df7-4705-8412-68a49d98cb46" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_7ee2e9ee-c1d6-4dc0-bc6c-4380c0f41105" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_7ee2e9ee-c1d6-4dc0-bc6c-4380c0f41105" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e764b453-3b07-49a4-9d66-b7c9a3281e96" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_fabb8722-b034-45f4-a2bd-09ce9a2bfbe0" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e764b453-3b07-49a4-9d66-b7c9a3281e96" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_d3228e4f-e872-4f34-8895-80243e409378" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e764b453-3b07-49a4-9d66-b7c9a3281e96" xlink:to="loc_glpi_TriggeringEventAxis_d3228e4f-e872-4f34-8895-80243e409378" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_d3228e4f-e872-4f34-8895-80243e409378_default" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_d3228e4f-e872-4f34-8895-80243e409378" xlink:to="loc_glpi_TriggeringEventDomain_d3228e4f-e872-4f34-8895-80243e409378_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_24dfa018-c1b1-4331-8932-ae80b146fa87" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_d3228e4f-e872-4f34-8895-80243e409378" xlink:to="loc_glpi_TriggeringEventDomain_24dfa018-c1b1-4331-8932-ae80b146fa87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_56abf529-e4e7-49c1-8fd4-de9b5b92974a" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_24dfa018-c1b1-4331-8932-ae80b146fa87" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_56abf529-e4e7-49c1-8fd4-de9b5b92974a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_60474085-56ca-44e5-acdf-48b5a966b2d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e764b453-3b07-49a4-9d66-b7c9a3281e96" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_60474085-56ca-44e5-acdf-48b5a966b2d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_60474085-56ca-44e5-acdf-48b5a966b2d8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_60474085-56ca-44e5-acdf-48b5a966b2d8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_60474085-56ca-44e5-acdf-48b5a966b2d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_60474085-56ca-44e5-acdf-48b5a966b2d8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennsylvaniaLiveMember_ee4f0b34-f845-46bb-ab65-fcdbc7be99b4" xlink:href="glpi-20221231.xsd#glpi_PennsylvaniaLiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_PennsylvaniaLiveMember_ee4f0b34-f845-46bb-ab65-fcdbc7be99b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEntertainmentMember_194ffb8b-4b3f-4252-a750-332d643f43cf" xlink:href="glpi-20221231.xsd#glpi_TropicanaEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_TropicanaEntertainmentMember_194ffb8b-4b3f-4252-a750-332d643f43cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_c8025ec7-3433-4adf-b44c-58e73b839c5a" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_TropicanaLasVegasMember_c8025ec7-3433-4adf-b44c-58e73b839c5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownMember_bff267ad-b2cb-4d88-8e5f-8f2cf0efdf4d" xlink:href="glpi-20221231.xsd#glpi_MorgantownMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_MorgantownMember_bff267ad-b2cb-4d88-8e5f-8f2cf0efdf4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_2565afef-11c4-42db-a317-fa3e5b2bcfe6" xlink:href="glpi-20221231.xsd#glpi_BallysTivertonCasinoHardrockBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_2565afef-11c4-42db-a317-fa3e5b2bcfe6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysLincolnMember_60b5bebf-7eab-4f67-911a-d11e8bb37b2b" xlink:href="glpi-20221231.xsd#glpi_BallysLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_BallysLincolnMember_60b5bebf-7eab-4f67-911a-d11e8bb37b2b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_e2080feb-425e-4506-92f0-c94e1e9155d2" xlink:href="glpi-20221231.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7360dfce-307c-4857-b70d-f2456e196fac" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_e2080feb-425e-4506-92f0-c94e1e9155d2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_f30e4a8c-d4da-407a-b237-d0d8aa78141e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e764b453-3b07-49a4-9d66-b7c9a3281e96" xlink:to="loc_us-gaap_LeaseContractualTermAxis_f30e4a8c-d4da-407a-b237-d0d8aa78141e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_f30e4a8c-d4da-407a-b237-d0d8aa78141e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_f30e4a8c-d4da-407a-b237-d0d8aa78141e" xlink:to="loc_us-gaap_LeaseContractualTermDomain_f30e4a8c-d4da-407a-b237-d0d8aa78141e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_f30e4a8c-d4da-407a-b237-d0d8aa78141e" xlink:to="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TwinRiverMasterLeaseMember_71bc9fdd-4705-4a86-b878-dafde9ca4f3d" xlink:href="glpi-20221231.xsd#glpi_TwinRiverMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:to="loc_glpi_TwinRiverMasterLeaseMember_71bc9fdd-4705-4a86-b878-dafde9ca4f3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownLeaseMember_a772db57-5f88-44c7-a2af-7234ee9d98c7" xlink:href="glpi-20221231.xsd#glpi_MorgantownLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:to="loc_glpi_MorgantownLeaseMember_a772db57-5f88-44c7-a2af-7234ee9d98c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_83583f9c-a857-49e1-b090-06094f310d43" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseTivertonBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:to="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_83583f9c-a857-49e1-b090-06094f310d43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseLincolnMember_fff47623-f751-447c-9b20-6643e96cb645" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:to="loc_glpi_BallysMasterLeaseLincolnMember_fff47623-f751-447c-9b20-6643e96cb645" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_3f34ba3d-131b-4159-b10c-759ba4159bdd" xlink:href="glpi-20221231.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_48576794-59a3-4386-8cd3-4462cc45465e" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_3f34ba3d-131b-4159-b10c-759ba4159bdd" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AcquisitionsHotelMarylandDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#AcquisitionsHotelMarylandDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AcquisitionsHotelMarylandDetails" xlink:type="extended" id="ia4a59b8d7f91461ba20ffc6e91069081_AcquisitionsHotelMarylandDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_7f698912-d818-4f15-86a6-9aa73aa46a49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectFinancingLeaseLeaseReceivable_654ee165-1017-4317-a827-5cd5c42a983c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DirectFinancingLeaseLeaseReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7f698912-d818-4f15-86a6-9aa73aa46a49" xlink:to="loc_us-gaap_DirectFinancingLeaseLeaseReceivable_654ee165-1017-4317-a827-5cd5c42a983c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_14fe3da3-fd5b-4368-9e5c-0784b7bfaab6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7f698912-d818-4f15-86a6-9aa73aa46a49" xlink:to="loc_us-gaap_FinanceLeaseLiability_14fe3da3-fd5b-4368-9e5c-0784b7bfaab6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_b4217908-9b74-425e-bc94-d608fdd750e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7f698912-d818-4f15-86a6-9aa73aa46a49" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_b4217908-9b74-425e-bc94-d608fdd750e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_642220dc-aa2d-4476-b989-1282815876ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7f698912-d818-4f15-86a6-9aa73aa46a49" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_642220dc-aa2d-4476-b989-1282815876ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_642220dc-aa2d-4476-b989-1282815876ee" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8d05389c-01f5-48d3-a406-d866c1d4b3fd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cbd12d2a-deed-44d7-a0e7-14e4aceaa45a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8d05389c-01f5-48d3-a406-d866c1d4b3fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_a4587c55-c1f6-4119-be2f-fc46a26f6ea1" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8d05389c-01f5-48d3-a406-d866c1d4b3fd" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_a4587c55-c1f6-4119-be2f-fc46a26f6ea1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AcquisitionsPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#AcquisitionsPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AcquisitionsPurchasePriceAllocationDetails" xlink:type="extended" id="i26cbbfaf1606476dba463621bd7b4365_AcquisitionsPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_049e8a9e-c6f5-4f19-9a9a-89d68034e71d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_049e8a9e-c6f5-4f19-9a9a-89d68034e71d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_36e7e4f5-7e93-4ce4-9ada-3de4e6671556" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_36e7e4f5-7e93-4ce4-9ada-3de4e6671556" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateInvestments_1d3b00e7-6e26-4d18-81a0-0b9a2b687146" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateInvestments_1d3b00e7-6e26-4d18-81a0-0b9a2b687146" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssetsAndLandRights_0a77b870-965c-40e4-86c4-8dfa5c6884d4" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssetsAndLandRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssetsAndLandRights_0a77b870-965c-40e4-86c4-8dfa5c6884d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLeaseObligation_73b9273c-230f-4b5e-9697-1b2c91c640cd" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLeaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_glpi_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLeaseObligation_73b9273c-230f-4b5e-9697-1b2c91c640cd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_812db7b6-8d31-48f2-b6d3-b4aaca44bcb3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_812db7b6-8d31-48f2-b6d3-b4aaca44bcb3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_feb9b3d0-0390-4efa-823d-c154f6fe1300" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9841e759-87cc-46f3-98a1-c4c65bf07575" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_feb9b3d0-0390-4efa-823d-c154f6fe1300" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_9d3d556a-1269-4384-a043-5a7aa363e011" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_feb9b3d0-0390-4efa-823d-c154f6fe1300" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_9d3d556a-1269-4384-a043-5a7aa363e011" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9d3d556a-1269-4384-a043-5a7aa363e011_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9d3d556a-1269-4384-a043-5a7aa363e011" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9d3d556a-1269-4384-a043-5a7aa363e011_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39f17188-ba4a-4865-92f4-2361f953387c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9d3d556a-1269-4384-a043-5a7aa363e011" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39f17188-ba4a-4865-92f4-2361f953387c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaEvansvilleDoverDownsMember_b66ae86f-715a-4dcc-8b6a-7359750c913d" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaEvansvilleDoverDownsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39f17188-ba4a-4865-92f4-2361f953387c" xlink:to="loc_glpi_BallysTropicanaEvansvilleDoverDownsMember_b66ae86f-715a-4dcc-8b6a-7359750c913d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetandotherreceivablesSummaryofCompanysInvestmentinLeasesDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#InvestmentinleasesfinancingreceivablesnetandotherreceivablesSummaryofCompanysInvestmentinLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetandotherreceivablesSummaryofCompanysInvestmentinLeasesDetails" xlink:type="extended" id="iab18fb06d65944ae8d76d452622fbb0a_InvestmentinleasesfinancingreceivablesnetandotherreceivablesSummaryofCompanysInvestmentinLeasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable_302219f9-0965-4e3a-8797-f246da475cbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable_302219f9-0965-4e3a-8797-f246da475cbe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseUnguaranteedResidualAsset_5bd65cae-1a17-411c-ba57-5e3f7e17b686" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesTypeLeaseUnguaranteedResidualAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_SalesTypeLeaseUnguaranteedResidualAsset_5bd65cae-1a17-411c-ba57-5e3f7e17b686" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_2e03b411-1f31-4af0-839f-06a6edebb7e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_NotesReceivableGross_2e03b411-1f31-4af0-839f-06a6edebb7e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_68e6423e-e7c6-447f-a18e-ac0c2bebcb4d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_ContractWithCustomerLiability_68e6423e-e7c6-447f-a18e-ac0c2bebcb4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_447dfc7c-7aa8-4f9e-8646-437c5c803efc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_447dfc7c-7aa8-4f9e-8646-437c5c803efc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectFinancingLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_b3536552-5626-458b-965c-d52c6e48dc59" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DirectFinancingLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_DirectFinancingLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_b3536552-5626-458b-965c-d52c6e48dc59" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_3c2e4850-efdd-4c8c-a57e-784c594995e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_91f48e4a-f871-4d5e-ab1b-9220adc1e94a" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_3c2e4850-efdd-4c8c-a57e-784c594995e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_ce12dbde-8d7b-4860-bd31-172501cdac2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_3c2e4850-efdd-4c8c-a57e-784c594995e4" xlink:to="loc_us-gaap_LeaseContractualTermAxis_ce12dbde-8d7b-4860-bd31-172501cdac2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_ce12dbde-8d7b-4860-bd31-172501cdac2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ce12dbde-8d7b-4860-bd31-172501cdac2b" xlink:to="loc_us-gaap_LeaseContractualTermDomain_ce12dbde-8d7b-4860-bd31-172501cdac2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_a76f61d9-b033-47a0-8dcc-2d3c5f03261d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ce12dbde-8d7b-4860-bd31-172501cdac2b" xlink:to="loc_us-gaap_LeaseContractualTermDomain_a76f61d9-b033-47a0-8dcc-2d3c5f03261d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_bb1bb080-453d-4c2f-b304-9004025b22fa" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_a76f61d9-b033-47a0-8dcc-2d3c5f03261d" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_bb1bb080-453d-4c2f-b304-9004025b22fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandAndPALeasesMember_3b4ce479-c420-4101-9f6f-7ae1713cae98" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandAndPALeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_a76f61d9-b033-47a0-8dcc-2d3c5f03261d" xlink:to="loc_glpi_LiveCasinoMarylandAndPALeasesMember_3b4ce479-c420-4101-9f6f-7ae1713cae98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_085b2318-bc07-4045-b3a6-a3436c6f5f7f" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_a76f61d9-b033-47a0-8dcc-2d3c5f03261d" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_085b2318-bc07-4045-b3a6-a3436c6f5f7f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetandotherreceivablesDirectFinancingLeasesDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#InvestmentinleasesfinancingreceivablesnetandotherreceivablesDirectFinancingLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetandotherreceivablesDirectFinancingLeasesDetails" xlink:type="extended" id="i33ae21bbb6cc4894a7f2e00b602470bc_InvestmentinleasesfinancingreceivablesnetandotherreceivablesDirectFinancingLeasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_21026798-b319-468d-91f7-f0298df0a4cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_21026798-b319-468d-91f7-f0298df0a4cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_a74acb48-1ec4-4542-b3b0-379361289874" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_21026798-b319-468d-91f7-f0298df0a4cf" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_a74acb48-1ec4-4542-b3b0-379361289874" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_b8549e3d-9e9e-448c-b68d-6e6d5d23efbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYear_4eb25de2-3717-4512-b30c-444f637ab329" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYear_4eb25de2-3717-4512-b30c-444f637ab329" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_d0738ce0-6ee7-4945-abb4-911cb072a8bb" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_d0738ce0-6ee7-4945-abb4-911cb072a8bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_33bd5151-7cf1-445c-88b4-951fccd835ef" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_33bd5151-7cf1-445c-88b4-951fccd835ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLoss_79b3d97d-fe3b-4531-99d1-a084f4b031b6" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLoss_79b3d97d-fe3b-4531-99d1-a084f4b031b6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLoss_461e2d51-a6f9-407d-b403-81e3811286af" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLoss_461e2d51-a6f9-407d-b403-81e3811286af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_4e8e01b5-6113-4562-be6e-bad6757aee32" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_4e8e01b5-6113-4562-be6e-bad6757aee32" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAmortizedCost_035ae015-f041-4e0e-8182-6d4d471873af" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAmortizedCost_035ae015-f041-4e0e-8182-6d4d471873af" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAmortizedCost_31ee6740-497b-4ebb-9800-bf7e7521faae" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAmortizedCost_31ee6740-497b-4ebb-9800-bf7e7521faae" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAmortizedCost_31003ed3-332f-4f8c-8d12-66898537be45" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAmortizedCost_31003ed3-332f-4f8c-8d12-66898537be45" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLossPercentage_229ba96b-f2d8-4449-afe1-fbd06389e680" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLossPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLossPercentage_229ba96b-f2d8-4449-afe1-fbd06389e680" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLossPercentage_911a265d-35e0-4f8f-bd4d-b8dd429ef388" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLossPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearAllowanceForCreditLossPercentage_911a265d-35e0-4f8f-bd4d-b8dd429ef388" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLossPercentage_9c2b7801-7363-4541-9888-8057948a4ac6" xlink:href="glpi-20221231.xsd#glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLossPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_glpi_NetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLossPercentage_9c2b7801-7363-4541-9888-8057948a4ac6" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_8de4ad1e-80f2-41be-b762-b387b0951b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_8de4ad1e-80f2-41be-b762-b387b0951b2b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_3b7e41d8-574c-49dd-b450-bad3984aa9e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_c927f0bc-9f5f-4a6e-a842-4fc3a0c8f7c7" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_3b7e41d8-574c-49dd-b450-bad3984aa9e5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_2c335a34-b0e2-4456-9217-1e41309d9283" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_3b7e41d8-574c-49dd-b450-bad3984aa9e5" xlink:to="loc_us-gaap_LeaseContractualTermAxis_2c335a34-b0e2-4456-9217-1e41309d9283" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_2c335a34-b0e2-4456-9217-1e41309d9283_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_2c335a34-b0e2-4456-9217-1e41309d9283" xlink:to="loc_us-gaap_LeaseContractualTermDomain_2c335a34-b0e2-4456-9217-1e41309d9283_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_f7ee7e4d-05d4-4d74-b579-d212458efd8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_2c335a34-b0e2-4456-9217-1e41309d9283" xlink:to="loc_us-gaap_LeaseContractualTermDomain_f7ee7e4d-05d4-4d74-b579-d212458efd8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_de59897f-cd91-463f-9621-632e8bd2b82f" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_f7ee7e4d-05d4-4d74-b579-d212458efd8f" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_de59897f-cd91-463f-9621-632e8bd2b82f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_da0125cf-3b68-487c-99be-d874b0c615d6" xlink:href="glpi-20221231.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_f7ee7e4d-05d4-4d74-b579-d212458efd8f" xlink:to="loc_glpi_PALiveMasterLeaseMember_da0125cf-3b68-487c-99be-d874b0c615d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoPAMasterLeaseMember_cef7de6d-e85d-40ae-bfee-2de3ea519940" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoPAMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_f7ee7e4d-05d4-4d74-b579-d212458efd8f" xlink:to="loc_glpi_LiveCasinoPAMasterLeaseMember_cef7de6d-e85d-40ae-bfee-2de3ea519940" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails" xlink:type="extended" id="icbf268ba7d7049b084d6d22414bb4a5d_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_d381b080-2dee-4935-b4be-9732c6bb6756" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_3adfda04-5bd2-45ae-be73-cefc547e0c61" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_d381b080-2dee-4935-b4be-9732c6bb6756" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_3adfda04-5bd2-45ae-be73-cefc547e0c61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0b6552fa-35a0-4cd0-bd2f-f5de2bc06ea0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_d381b080-2dee-4935-b4be-9732c6bb6756" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0b6552fa-35a0-4cd0-bd2f-f5de2bc06ea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_8dcf9534-267e-4274-b64c-ca46a762deec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_d381b080-2dee-4935-b4be-9732c6bb6756" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_8dcf9534-267e-4274-b64c-ca46a762deec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_9e1e191a-54b3-4b60-b24e-9408015a0966" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_8dcf9534-267e-4274-b64c-ca46a762deec" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_9e1e191a-54b3-4b60-b24e-9408015a0966" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9e1e191a-54b3-4b60-b24e-9408015a0966_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_9e1e191a-54b3-4b60-b24e-9408015a0966" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9e1e191a-54b3-4b60-b24e-9408015a0966_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_32c5c149-e1d0-41e3-a1f7-730202c1929f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_9e1e191a-54b3-4b60-b24e-9408015a0966" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_32c5c149-e1d0-41e3-a1f7-730202c1929f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember_77cfd03b-e5a3-437e-bedf-e8fb2011d651" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_32c5c149-e1d0-41e3-a1f7-730202c1929f" xlink:to="loc_glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember_77cfd03b-e5a3-437e-bedf-e8fb2011d651" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_3a1092d8-709c-405a-b95b-95e2c2f482f3" xlink:href="glpi-20221231.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_32c5c149-e1d0-41e3-a1f7-730202c1929f" xlink:to="loc_glpi_LandRightsMember_3a1092d8-709c-405a-b95b-95e2c2f482f3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLandRightsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLandRightsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLandRightsDetails" xlink:type="extended" id="i8b8507517e4e4577b54e44589e460988_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLandRightsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_c500e0be-f9c8-4be9-bba9-3f522ef469ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_c500e0be-f9c8-4be9-bba9-3f522ef469ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9009bdfc-45d5-47ae-b39c-478a76deb9a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9009bdfc-45d5-47ae-b39c-478a76deb9a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_7b698236-aa78-4b3c-8018-1ef554d2b98b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_7b698236-aa78-4b3c-8018-1ef554d2b98b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5690953f-89f0-4311-acfe-cc51ac5a8f3a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5690953f-89f0-4311-acfe-cc51ac5a8f3a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9c18db2e-f25e-4181-8b6b-0d0b6a89a153" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9c18db2e-f25e-4181-8b6b-0d0b6a89a153" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_ad567ea5-85e1-4c33-8830-fa429323e339" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_ad567ea5-85e1-4c33-8830-fa429323e339" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_a1bb6336-235f-4544-9841-5273c853eec9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_a1bb6336-235f-4544-9841-5273c853eec9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_d1a3f130-38e7-4de9-90c3-3241000d2736" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_d1a3f130-38e7-4de9-90c3-3241000d2736" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_185a1bff-1ffb-4504-99e6-7ccc2ca0052f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_185a1bff-1ffb-4504-99e6-7ccc2ca0052f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_f6d28cf2-1920-416c-8f8c-3a81204c0d91" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_f02bb4a5-fd71-48e1-b27c-4e8091f6af81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_f6d28cf2-1920-416c-8f8c-3a81204c0d91" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_39ba9cec-c482-408b-a508-6d1778a04a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2e62cba9-09a2-4e78-ba52-d5fe2d77ad9a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f96efb96-c560-427c-8c8b-f52bd71e2d13" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2e62cba9-09a2-4e78-ba52-d5fe2d77ad9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0d1facd2-92d6-4651-8e23-3fec44c94dbd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2e62cba9-09a2-4e78-ba52-d5fe2d77ad9a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0d1facd2-92d6-4651-8e23-3fec44c94dbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0d1facd2-92d6-4651-8e23-3fec44c94dbd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0d1facd2-92d6-4651-8e23-3fec44c94dbd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0d1facd2-92d6-4651-8e23-3fec44c94dbd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fa9b8d0f-2ac6-4414-aaed-8ca37cc55312" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0d1facd2-92d6-4651-8e23-3fec44c94dbd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fa9b8d0f-2ac6-4414-aaed-8ca37cc55312" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffMarketFavorableLeaseMember_82642ae0-c294-4124-b615-ec8de02052ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OffMarketFavorableLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fa9b8d0f-2ac6-4414-aaed-8ca37cc55312" xlink:to="loc_us-gaap_OffMarketFavorableLeaseMember_82642ae0-c294-4124-b615-ec8de02052ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_c628c23e-0695-45f6-a263-af664019faa9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2e62cba9-09a2-4e78-ba52-d5fe2d77ad9a" xlink:to="loc_srt_RangeAxis_c628c23e-0695-45f6-a263-af664019faa9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c628c23e-0695-45f6-a263-af664019faa9_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_c628c23e-0695-45f6-a263-af664019faa9" xlink:to="loc_srt_RangeMember_c628c23e-0695-45f6-a263-af664019faa9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bc48c2e0-ccf5-40f1-b173-f01c1019b7a8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_c628c23e-0695-45f6-a263-af664019faa9" xlink:to="loc_srt_RangeMember_bc48c2e0-ccf5-40f1-b173-f01c1019b7a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ad52fcfc-f16e-4d49-abad-0b56415bad12" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bc48c2e0-ccf5-40f1-b173-f01c1019b7a8" xlink:to="loc_srt_MinimumMember_ad52fcfc-f16e-4d49-abad-0b56415bad12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_74b2e779-2820-4e68-a225-de4920c60528" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bc48c2e0-ccf5-40f1-b173-f01c1019b7a8" xlink:to="loc_srt_MaximumMember_74b2e779-2820-4e68-a225-de4920c60528" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_688915e9-8ab2-4ed9-a804-7906a4d4fed6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2e62cba9-09a2-4e78-ba52-d5fe2d77ad9a" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_688915e9-8ab2-4ed9-a804-7906a4d4fed6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_688915e9-8ab2-4ed9-a804-7906a4d4fed6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_688915e9-8ab2-4ed9-a804-7906a4d4fed6" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_688915e9-8ab2-4ed9-a804-7906a4d4fed6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a81df514-18c6-4659-8e45-6e627e00060e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_688915e9-8ab2-4ed9-a804-7906a4d4fed6" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a81df514-18c6-4659-8e45-6e627e00060e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_f9452d3a-8db7-4c9f-9df0-a72aa85d6fcd" xlink:href="glpi-20221231.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a81df514-18c6-4659-8e45-6e627e00060e" xlink:to="loc_glpi_LandRightsMember_f9452d3a-8db7-4c9f-9df0-a72aa85d6fcd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails" xlink:type="extended" id="i83d40f4d96b84d8cad4b5ece736857d0_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_315149da-9057-43e2-bc90-37a9f68e1cef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_OperatingLeaseCost_315149da-9057-43e2-bc90-37a9f68e1cef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_01886c61-f9e7-4962-9eac-8fef73b6526d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_VariableLeaseCost_01886c61-f9e7-4962-9eac-8fef73b6526d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_19d032cf-3515-495b-b468-e497b3053c2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_ShortTermLeaseCost_19d032cf-3515-495b-b468-e497b3053c2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f89b7360-d043-4eaf-ae4d-2a9820292bae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f89b7360-d043-4eaf-ae4d-2a9820292bae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_adb80c22-f4d8-4cbf-aded-1b8957d45ba0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_LeaseCost_adb80c22-f4d8-4cbf-aded-1b8957d45ba0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_d872e8ab-e8a7-4cce-bfa7-2b28f9206fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_b69e96be-6877-407f-8d79-6422c07ee22e" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_d872e8ab-e8a7-4cce-bfa7-2b28f9206fbe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_229302ed-6592-4cb9-a5e6-7bc0e91a23ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_d872e8ab-e8a7-4cce-bfa7-2b28f9206fbe" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_229302ed-6592-4cb9-a5e6-7bc0e91a23ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_229302ed-6592-4cb9-a5e6-7bc0e91a23ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_229302ed-6592-4cb9-a5e6-7bc0e91a23ad" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_229302ed-6592-4cb9-a5e6-7bc0e91a23ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_53b588af-bbfb-4d46-8741-51d72bcb5141" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_229302ed-6592-4cb9-a5e6-7bc0e91a23ad" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_53b588af-bbfb-4d46-8741-51d72bcb5141" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_cd910e29-b1a5-4404-b2e1-1d60b35efa80" xlink:href="glpi-20221231.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_53b588af-bbfb-4d46-8741-51d72bcb5141" xlink:to="loc_glpi_LandRightsMember_cd910e29-b1a5-4404-b2e1-1d60b35efa80" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended" id="i2847aa228f034ae1bf618d3e9bcdf006_FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_2580c1ce-391c-4096-af64-110ae84349b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_106a5f2f-1a72-42bc-9c41-dd6f36113406" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_2580c1ce-391c-4096-af64-110ae84349b0" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_106a5f2f-1a72-42bc-9c41-dd6f36113406" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5addf6d2-4a4a-4ec2-9ff5-d59988508dfc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_106a5f2f-1a72-42bc-9c41-dd6f36113406" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5addf6d2-4a4a-4ec2-9ff5-d59988508dfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_2a62e934-593c-4c29-a86a-ebbf163b1abc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_106a5f2f-1a72-42bc-9c41-dd6f36113406" xlink:to="loc_us-gaap_NotesReceivableNet_2a62e934-593c-4c29-a86a-ebbf163b1abc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Deferredcompensationplanassetsfairvaluedisclosure_4c14b69f-7399-488f-a509-121f7fe95361" xlink:href="glpi-20221231.xsd#glpi_Deferredcompensationplanassetsfairvaluedisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_106a5f2f-1a72-42bc-9c41-dd6f36113406" xlink:to="loc_glpi_Deferredcompensationplanassetsfairvaluedisclosure_4c14b69f-7399-488f-a509-121f7fe95361" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_53dd1164-8be5-4450-be37-a47965ffaf4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_2580c1ce-391c-4096-af64-110ae84349b0" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_53dd1164-8be5-4450-be37-a47965ffaf4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d4e6f55b-cf06-4054-927c-75667e909737" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_53dd1164-8be5-4450-be37-a47965ffaf4e" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d4e6f55b-cf06-4054-927c-75667e909737" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditFairValueDisclosure_f3664396-5aee-4862-91dc-bac065f0523b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LinesOfCreditFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d4e6f55b-cf06-4054-927c-75667e909737" xlink:to="loc_us-gaap_LinesOfCreditFairValueDisclosure_f3664396-5aee-4862-91dc-bac065f0523b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_3c00c8b3-04da-4039-a0e6-6bfe06c148ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d4e6f55b-cf06-4054-927c-75667e909737" xlink:to="loc_us-gaap_NotesPayableFairValueDisclosure_3c00c8b3-04da-4039-a0e6-6bfe06c148ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_4b050b33-2f65-4b84-94fc-841d56b58f20" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_2580c1ce-391c-4096-af64-110ae84349b0" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_4b050b33-2f65-4b84-94fc-841d56b58f20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_a4def984-2583-4b2c-b5df-ddbf0fce77ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_4b050b33-2f65-4b84-94fc-841d56b58f20" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_a4def984-2583-4b2c-b5df-ddbf0fce77ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a4def984-2583-4b2c-b5df-ddbf0fce77ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a4def984-2583-4b2c-b5df-ddbf0fce77ff" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a4def984-2583-4b2c-b5df-ddbf0fce77ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f8d3ac6a-794f-4dbe-ae35-2bfe2bfff8e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a4def984-2583-4b2c-b5df-ddbf0fce77ff" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f8d3ac6a-794f-4dbe-ae35-2bfe2bfff8e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_4316e94a-0279-4cbd-8c85-650e1d73ded8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f8d3ac6a-794f-4dbe-ae35-2bfe2bfff8e3" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_4316e94a-0279-4cbd-8c85-650e1d73ded8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_362ceac9-ab81-46f7-8440-358514e6900e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f8d3ac6a-794f-4dbe-ae35-2bfe2bfff8e3" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_362ceac9-ab81-46f7-8440-358514e6900e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_096b3199-ac46-4fa7-a1dd-ae31563fb8ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f8d3ac6a-794f-4dbe-ae35-2bfe2bfff8e3" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_096b3199-ac46-4fa7-a1dd-ae31563fb8ec" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LongtermDebtScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtScheduleofLongTermDebtDetails" xlink:type="extended" id="ie230c149782c4b4f84bd53fef1a3de42_LongtermDebtScheduleofLongTermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_5cea77b7-1b45-4733-a708-d3b2bb1544e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_5cea77b7-1b45-4733-a708-d3b2bb1544e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LongTermDebtGrossandLeaseObligations_a8684564-c045-4393-bf14-f627550f7568" xlink:href="glpi-20221231.xsd#glpi_LongTermDebtGrossandLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_glpi_LongTermDebtGrossandLeaseObligations_a8684564-c045-4393-bf14-f627550f7568" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_1886359a-4972-4db5-9388-e6f76ef6f093" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_1886359a-4972-4db5-9388-e6f76ef6f093" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_d81eeedd-8b6b-4928-a1fa-90c2b70ee568" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_d81eeedd-8b6b-4928-a1fa-90c2b70ee568" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8eb77438-a5b4-4f72-8870-bdc68233c5be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8eb77438-a5b4-4f72-8870-bdc68233c5be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_e7f104eb-1623-43d8-8b1a-792f036e7407" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_e7f104eb-1623-43d8-8b1a-792f036e7407" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_16f1682d-ebdf-43df-98f3-66cc6ca2c9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_16f1682d-ebdf-43df-98f3-66cc6ca2c9b5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_80b6362b-40b0-4cb5-8be6-a02a5e14692a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_80b6362b-40b0-4cb5-8be6-a02a5e14692a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_ad4f5ab2-baa1-42a4-8579-d82cc5eb544c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_ad4f5ab2-baa1-42a4-8579-d82cc5eb544c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_7aaf9721-4ac7-4ec4-8f88-c0b00041acb3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_7aaf9721-4ac7-4ec4-8f88-c0b00041acb3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_a470d0a9-3e53-430b-9e0c-caf45a6b4414" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_a470d0a9-3e53-430b-9e0c-caf45a6b4414" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_fbd574ff-9b99-4b20-bdd8-47f8261f6469" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_fbd574ff-9b99-4b20-bdd8-47f8261f6469" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6c2106a4-3b4f-4747-ac0e-7ef0e90bc38e" xlink:to="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_6a9a75e9-3ac7-4de6-80d5-7729f76915e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:to="loc_us-gaap_CreditFacilityAxis_6a9a75e9-3ac7-4de6-80d5-7729f76915e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_6a9a75e9-3ac7-4de6-80d5-7729f76915e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_6a9a75e9-3ac7-4de6-80d5-7729f76915e5" xlink:to="loc_us-gaap_CreditFacilityDomain_6a9a75e9-3ac7-4de6-80d5-7729f76915e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_7d7b3210-61f3-4531-bfbb-c89883e29b41" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_6a9a75e9-3ac7-4de6-80d5-7729f76915e5" xlink:to="loc_us-gaap_CreditFacilityDomain_7d7b3210-61f3-4531-bfbb-c89883e29b41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_cb21bc55-05f7-4f1b-bf19-fec6fd42309a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_7d7b3210-61f3-4531-bfbb-c89883e29b41" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_cb21bc55-05f7-4f1b-bf19-fec6fd42309a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanA2FacilityMember_fb167632-f911-424c-a2ae-476d98af7e6f" xlink:href="glpi-20221231.xsd#glpi_TermLoanA2FacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_7d7b3210-61f3-4531-bfbb-c89883e29b41" xlink:to="loc_glpi_TermLoanA2FacilityMember_fb167632-f911-424c-a2ae-476d98af7e6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DelayedDrawMember_6ad46381-3235-44a3-8fa3-db9625f9f031" xlink:href="glpi-20221231.xsd#glpi_DelayedDrawMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_7d7b3210-61f3-4531-bfbb-c89883e29b41" xlink:to="loc_glpi_DelayedDrawMember_6ad46381-3235-44a3-8fa3-db9625f9f031" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_367acf59-8f8c-4847-962c-75ed4586d382" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:to="loc_us-gaap_DebtInstrumentAxis_367acf59-8f8c-4847-962c-75ed4586d382" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_367acf59-8f8c-4847-962c-75ed4586d382_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_367acf59-8f8c-4847-962c-75ed4586d382" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_367acf59-8f8c-4847-962c-75ed4586d382_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_367acf59-8f8c-4847-962c-75ed4586d382" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_97493888-f6f3-4dbd-b7b6-e1862275f631" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_97493888-f6f3-4dbd-b7b6-e1862275f631" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanA2FacilityMember_55d8e962-56e7-430d-a3bc-a9ac243d3e60" xlink:href="glpi-20221231.xsd#glpi_TermLoanA2FacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_TermLoanA2FacilityMember_55d8e962-56e7-430d-a3bc-a9ac243d3e60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_febc3139-a951-4765-9dec-a7eb17e5bcdc" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.375PercentDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_febc3139-a951-4765-9dec-a7eb17e5bcdc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_1f869561-a1fb-40ed-8182-bf0612ad6777" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes3.35PercentDue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_1f869561-a1fb-40ed-8182-bf0612ad6777" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.250PercentDue2025Member_92b64d61-e4cc-4e34-a720-12ce5085ebf3" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.250PercentDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes5.250PercentDue2025Member_92b64d61-e4cc-4e34-a720-12ce5085ebf3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2026Member_00a4c9aa-daa6-4d7e-850e-f076b498a4af" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.375PercentDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2026Member_00a4c9aa-daa6-4d7e-850e-f076b498a4af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.750PercentDue2028Member_5526ee8c-a7cb-4c12-b5ec-f8e2d7114fe6" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.750PercentDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes5.750PercentDue2028Member_5526ee8c-a7cb-4c12-b5ec-f8e2d7114fe6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.300PercentDue2029Member_911152dd-8747-4430-9f8e-159b13962978" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.300PercentDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes5.300PercentDue2029Member_911152dd-8747-4430-9f8e-159b13962978" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_96d3d16b-4992-4af4-96bc-1c143158a34e" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes4.00PercentDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_96d3d16b-4992-4af4-96bc-1c143158a34e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_9c8ee109-6bc9-4442-a2fc-0447b0715a3f" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes400PercentDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_9c8ee109-6bc9-4442-a2fc-0447b0715a3f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_565c032c-b3ea-490e-961b-7bf906470242" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes325PercentDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_565c032c-b3ea-490e-961b-7bf906470242" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanCreditFacilityMember_b8db59ab-143a-487e-b034-8642584ef94f" xlink:href="glpi-20221231.xsd#glpi_TermLoanCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a31912d0-0b79-4a09-aad9-67e69141efc8" xlink:to="loc_glpi_TermLoanCreditFacilityMember_b8db59ab-143a-487e-b034-8642584ef94f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_bbed09cc-5c7b-4744-9686-f78aa8ed2947" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_bbed09cc-5c7b-4744-9686-f78aa8ed2947" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_bbed09cc-5c7b-4744-9686-f78aa8ed2947_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bbed09cc-5c7b-4744-9686-f78aa8ed2947" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_bbed09cc-5c7b-4744-9686-f78aa8ed2947_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1828ed27-1fc0-41f1-b4c8-1a9f57bb92fd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bbed09cc-5c7b-4744-9686-f78aa8ed2947" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1828ed27-1fc0-41f1-b4c8-1a9f57bb92fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OtherDebtMember_1de652e7-f400-43f3-a73a-3c82e7f97b16" xlink:href="glpi-20221231.xsd#glpi_OtherDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1828ed27-1fc0-41f1-b4c8-1a9f57bb92fd" xlink:to="loc_glpi_OtherDebtMember_1de652e7-f400-43f3-a73a-3c82e7f97b16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_78552cf8-bb97-42bf-8e67-57596007f1ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1828ed27-1fc0-41f1-b4c8-1a9f57bb92fd" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_78552cf8-bb97-42bf-8e67-57596007f1ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_117fd960-f7d6-4b50-82e3-7b3ccd41d1bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1828ed27-1fc0-41f1-b4c8-1a9f57bb92fd" xlink:to="loc_us-gaap_LineOfCreditMember_117fd960-f7d6-4b50-82e3-7b3ccd41d1bc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a46ccec8-45bf-4b18-bead-5f64c5e39907" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:to="loc_srt_RangeAxis_a46ccec8-45bf-4b18-bead-5f64c5e39907" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a46ccec8-45bf-4b18-bead-5f64c5e39907_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a46ccec8-45bf-4b18-bead-5f64c5e39907" xlink:to="loc_srt_RangeMember_a46ccec8-45bf-4b18-bead-5f64c5e39907_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_de54f555-f221-4433-b67b-da7d1f6b930b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a46ccec8-45bf-4b18-bead-5f64c5e39907" xlink:to="loc_srt_RangeMember_de54f555-f221-4433-b67b-da7d1f6b930b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_24d7a656-f960-4b4f-9de1-5436f4727e92" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_de54f555-f221-4433-b67b-da7d1f6b930b" xlink:to="loc_srt_MinimumMember_24d7a656-f960-4b4f-9de1-5436f4727e92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d31a72a5-2e07-4001-9281-1c8b94e7cecb" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_de54f555-f221-4433-b67b-da7d1f6b930b" xlink:to="loc_srt_MaximumMember_d31a72a5-2e07-4001-9281-1c8b94e7cecb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_fca461c4-a3b9-45aa-9ebe-371bef8f9954" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_98b18933-3f4f-4936-acfe-846bde364586" xlink:to="loc_us-gaap_VariableRateAxis_fca461c4-a3b9-45aa-9ebe-371bef8f9954" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_fca461c4-a3b9-45aa-9ebe-371bef8f9954_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_fca461c4-a3b9-45aa-9ebe-371bef8f9954" xlink:to="loc_us-gaap_VariableRateDomain_fca461c4-a3b9-45aa-9ebe-371bef8f9954_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_2e1206cb-c53c-4eb0-a3ea-541ed959981e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_fca461c4-a3b9-45aa-9ebe-371bef8f9954" xlink:to="loc_us-gaap_VariableRateDomain_2e1206cb-c53c-4eb0-a3ea-541ed959981e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SecuredOvernightFinancingRateSOFRMember_4b5beb42-29aa-471c-9b9b-f021e2c8fe28" xlink:href="glpi-20221231.xsd#glpi_SecuredOvernightFinancingRateSOFRMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_2e1206cb-c53c-4eb0-a3ea-541ed959981e" xlink:to="loc_glpi_SecuredOvernightFinancingRateSOFRMember_4b5beb42-29aa-471c-9b9b-f021e2c8fe28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_f02cc8a3-2496-49db-9a19-b56d309fd336" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_2e1206cb-c53c-4eb0-a3ea-541ed959981e" xlink:to="loc_us-gaap_BaseRateMember_f02cc8a3-2496-49db-9a19-b56d309fd336" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredCreditFacilityDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LongtermDebtSeniorUnsecuredCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredCreditFacilityDetails" xlink:type="extended" id="i7040badee54143a38200987f10d0d4c0_LongtermDebtSeniorUnsecuredCreditFacilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_bc22b14b-c0b8-480a-a3d1-4e5553dea59b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_bc22b14b-c0b8-480a-a3d1-4e5553dea59b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_23e1dfad-3372-45cf-b03e-32e20d4c678a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_23e1dfad-3372-45cf-b03e-32e20d4c678a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1f8cc261-dd0c-43d6-9bd1-5428dd46e3ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1f8cc261-dd0c-43d6-9bd1-5428dd46e3ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_8fbc9790-d892-4a45-a7e6-1e9cad2c5e6f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_8fbc9790-d892-4a45-a7e6-1e9cad2c5e6f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_2ad5ae75-616e-49d7-b5c3-815b022c01c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_2ad5ae75-616e-49d7-b5c3-815b022c01c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_cacedbbc-1a6b-4fa2-86ff-7bc7893b63a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_cacedbbc-1a6b-4fa2-86ff-7bc7893b63a6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1a76f078-d1e5-4a79-9375-8ae40c579bc4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1a76f078-d1e5-4a79-9375-8ae40c579bc4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_4a8df9fb-ae88-4e7c-96d0-07969d700d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_4a8df9fb-ae88-4e7c-96d0-07969d700d71" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8c4957c1-07f4-4dae-9095-3999d9d486e1" xlink:to="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_d82f8679-60dc-4fe4-815d-6a33c4c837b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:to="loc_us-gaap_CreditFacilityAxis_d82f8679-60dc-4fe4-815d-6a33c4c837b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d82f8679-60dc-4fe4-815d-6a33c4c837b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_d82f8679-60dc-4fe4-815d-6a33c4c837b7" xlink:to="loc_us-gaap_CreditFacilityDomain_d82f8679-60dc-4fe4-815d-6a33c4c837b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a9b14113-6f2f-4d0c-9c0b-db8e65d6b668" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_d82f8679-60dc-4fe4-815d-6a33c4c837b7" xlink:to="loc_us-gaap_CreditFacilityDomain_a9b14113-6f2f-4d0c-9c0b-db8e65d6b668" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_e8d64714-5b1f-4eff-affd-8e33c9533aa8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a9b14113-6f2f-4d0c-9c0b-db8e65d6b668" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_e8d64714-5b1f-4eff-affd-8e33c9533aa8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanA2FacilityMember_318c1d9c-57ac-407c-bd76-fe11b88677df" xlink:href="glpi-20221231.xsd#glpi_TermLoanA2FacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a9b14113-6f2f-4d0c-9c0b-db8e65d6b668" xlink:to="loc_glpi_TermLoanA2FacilityMember_318c1d9c-57ac-407c-bd76-fe11b88677df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4049eab9-02fe-402c-bbdd-9bb6c67d6af7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:to="loc_us-gaap_DebtInstrumentAxis_4049eab9-02fe-402c-bbdd-9bb6c67d6af7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4049eab9-02fe-402c-bbdd-9bb6c67d6af7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4049eab9-02fe-402c-bbdd-9bb6c67d6af7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4049eab9-02fe-402c-bbdd-9bb6c67d6af7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_48981d29-247b-4b01-ad8d-1c0ec7edacf0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4049eab9-02fe-402c-bbdd-9bb6c67d6af7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_48981d29-247b-4b01-ad8d-1c0ec7edacf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_79cd6a10-2751-44d4-9ec3-72770939ff00" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes400PercentDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_48981d29-247b-4b01-ad8d-1c0ec7edacf0" xlink:to="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_79cd6a10-2751-44d4-9ec3-72770939ff00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_5271aae1-cffc-421a-a59c-92f543aa0956" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes4.00PercentDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_48981d29-247b-4b01-ad8d-1c0ec7edacf0" xlink:to="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_5271aae1-cffc-421a-a59c-92f543aa0956" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_cd7172b8-6083-448d-bb58-4bba7af27666" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_cd7172b8-6083-448d-bb58-4bba7af27666" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_cd7172b8-6083-448d-bb58-4bba7af27666_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_cd7172b8-6083-448d-bb58-4bba7af27666" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_cd7172b8-6083-448d-bb58-4bba7af27666_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6d570e1c-3c73-4fe9-942c-9ce69c20775f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_cd7172b8-6083-448d-bb58-4bba7af27666" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6d570e1c-3c73-4fe9-942c-9ce69c20775f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_047f3d01-f855-4664-8edc-613e647019e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6d570e1c-3c73-4fe9-942c-9ce69c20775f" xlink:to="loc_us-gaap_LineOfCreditMember_047f3d01-f855-4664-8edc-613e647019e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_036f3e61-826a-4005-885d-e85d93e6e98e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6d570e1c-3c73-4fe9-942c-9ce69c20775f" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_036f3e61-826a-4005-885d-e85d93e6e98e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a5759ba6-de2b-44c9-8773-cce5b8827bef" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:to="loc_srt_RangeAxis_a5759ba6-de2b-44c9-8773-cce5b8827bef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a5759ba6-de2b-44c9-8773-cce5b8827bef_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a5759ba6-de2b-44c9-8773-cce5b8827bef" xlink:to="loc_srt_RangeMember_a5759ba6-de2b-44c9-8773-cce5b8827bef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2bea8c79-fd81-4044-9b17-a245a2a97243" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a5759ba6-de2b-44c9-8773-cce5b8827bef" xlink:to="loc_srt_RangeMember_2bea8c79-fd81-4044-9b17-a245a2a97243" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_8ab3f557-cb75-40ce-812f-dbbced233a94" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bea8c79-fd81-4044-9b17-a245a2a97243" xlink:to="loc_srt_MinimumMember_8ab3f557-cb75-40ce-812f-dbbced233a94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_48f27fd1-18ba-498e-85b6-12452fd19e55" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bea8c79-fd81-4044-9b17-a245a2a97243" xlink:to="loc_srt_MaximumMember_48f27fd1-18ba-498e-85b6-12452fd19e55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_14364bf7-093e-46ed-9994-fe023b4bd0b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2a4f59f2-5b4f-4434-8fa9-dc0c752694a4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_14364bf7-093e-46ed-9994-fe023b4bd0b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_14364bf7-093e-46ed-9994-fe023b4bd0b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_14364bf7-093e-46ed-9994-fe023b4bd0b4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_14364bf7-093e-46ed-9994-fe023b4bd0b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_99050d43-1a77-48f1-97d5-6b4f6898f75d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_14364bf7-093e-46ed-9994-fe023b4bd0b4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_99050d43-1a77-48f1-97d5-6b4f6898f75d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredNotesDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#LongtermDebtSeniorUnsecuredNotesDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredNotesDetails" xlink:type="extended" id="i9f92ca12dbad4277bdec68b0519143b0_LongtermDebtSeniorUnsecuredNotesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_12fe440b-fe5d-431e-b032-49653dc02189" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_12fe440b-fe5d-431e-b032-49653dc02189" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_65e62bd3-fa6d-45e1-9873-5b5164888df5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_65e62bd3-fa6d-45e1-9873-5b5164888df5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_24271179-a295-434f-9e3f-3d54f386cce7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_24271179-a295-434f-9e3f-3d54f386cce7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DebtInstrumentDiscountRateAtIssuanceOfFaceValue_4e22e831-eb93-41f1-8566-469232bdd843" xlink:href="glpi-20221231.xsd#glpi_DebtInstrumentDiscountRateAtIssuanceOfFaceValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_glpi_DebtInstrumentDiscountRateAtIssuanceOfFaceValue_4e22e831-eb93-41f1-8566-469232bdd843" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_96ecda13-4e6e-4353-9944-3267ecebc654" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_RepaymentsOfDebt_96ecda13-4e6e-4353-9944-3267ecebc654" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_9f10c570-33b2-4d88-b26f-08c810250a18" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_9f10c570-33b2-4d88-b26f-08c810250a18" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_7e383001-4d11-4575-8145-bfb03a2c6019" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_7e383001-4d11-4575-8145-bfb03a2c6019" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Numberofdayspriortomaturitynotescanberedeemedandreceivemakewholeredemptionpremium_b6621eac-9d98-497b-a568-1e597fb3128b" xlink:href="glpi-20221231.xsd#glpi_Numberofdayspriortomaturitynotescanberedeemedandreceivemakewholeredemptionpremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_glpi_Numberofdayspriortomaturitynotescanberedeemedandreceivemakewholeredemptionpremium_b6621eac-9d98-497b-a568-1e597fb3128b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberofSubsidiaryNoteIssuers_00438898-b64b-4bf9-a995-dd8b885d157c" xlink:href="glpi-20221231.xsd#glpi_NumberofSubsidiaryNoteIssuers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_glpi_NumberofSubsidiaryNoteIssuers_00438898-b64b-4bf9-a995-dd8b885d157c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cea76018-c0ec-4aa4-8583-67e011ddd1e0" xlink:to="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fa471e2f-2c6a-4216-9895-1d0593d30cf5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:to="loc_us-gaap_DebtInstrumentAxis_fa471e2f-2c6a-4216-9895-1d0593d30cf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fa471e2f-2c6a-4216-9895-1d0593d30cf5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fa471e2f-2c6a-4216-9895-1d0593d30cf5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fa471e2f-2c6a-4216-9895-1d0593d30cf5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fa471e2f-2c6a-4216-9895-1d0593d30cf5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_e7e83bc0-7aea-45a9-9c13-18d7b7959187" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_us-gaap_SeniorNotesMember_e7e83bc0-7aea-45a9-9c13-18d7b7959187" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_4226f04c-c3f0-40b6-87a6-e912d3ef7c6a" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes325PercentDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_4226f04c-c3f0-40b6-87a6-e912d3ef7c6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.875PercentDue2020Member_5ce77a87-b041-407f-8853-a1a254296f72" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes4.875PercentDue2020Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes4.875PercentDue2020Member_5ce77a87-b041-407f-8853-a1a254296f72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.375PercentDue2021Member_bad8ced5-5e7e-475a-8860-6038c73ab443" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes4.375PercentDue2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes4.375PercentDue2021Member_bad8ced5-5e7e-475a-8860-6038c73ab443" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_a622078d-9759-4dcd-905c-c759d5c480b1" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes400PercentDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_a622078d-9759-4dcd-905c-c759d5c480b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_9a4d65c2-2532-4ba1-bc8f-b04bf0729e5c" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes3.35PercentDue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_9a4d65c2-2532-4ba1-bc8f-b04bf0729e5c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_fd096b4a-8b4c-481d-b3f1-96fa1aad6c4f" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes4.00PercentDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_733a79c0-87f7-4305-b4a1-737b694d98cd" xlink:to="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_fd096b4a-8b4c-481d-b3f1-96fa1aad6c4f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_ce888309-2d69-40a3-bb9b-55c58523dd76" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:to="loc_srt_RangeAxis_ce888309-2d69-40a3-bb9b-55c58523dd76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ce888309-2d69-40a3-bb9b-55c58523dd76_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_ce888309-2d69-40a3-bb9b-55c58523dd76" xlink:to="loc_srt_RangeMember_ce888309-2d69-40a3-bb9b-55c58523dd76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_cf663fd7-64ca-4019-9722-45cdb5674a3f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_ce888309-2d69-40a3-bb9b-55c58523dd76" xlink:to="loc_srt_RangeMember_cf663fd7-64ca-4019-9722-45cdb5674a3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b7b116a9-6254-47a7-a037-cd5932497a68" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_cf663fd7-64ca-4019-9722-45cdb5674a3f" xlink:to="loc_srt_MinimumMember_b7b116a9-6254-47a7-a037-cd5932497a68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_51575348-188c-4bca-8305-ffdb705faaa4" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:to="loc_glpi_TriggeringEventAxis_51575348-188c-4bca-8305-ffdb705faaa4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_51575348-188c-4bca-8305-ffdb705faaa4_default" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_51575348-188c-4bca-8305-ffdb705faaa4" xlink:to="loc_glpi_TriggeringEventDomain_51575348-188c-4bca-8305-ffdb705faaa4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_b6f24da4-3616-4f45-bdad-603fedb3dfae" xlink:href="glpi-20221231.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_51575348-188c-4bca-8305-ffdb705faaa4" xlink:to="loc_glpi_TriggeringEventDomain_b6f24da4-3616-4f45-bdad-603fedb3dfae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ChangeofControlMember_6eb5328f-1ec1-4bfa-a3a3-8c4908ae0302" xlink:href="glpi-20221231.xsd#glpi_ChangeofControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_b6f24da4-3616-4f45-bdad-603fedb3dfae" xlink:to="loc_glpi_ChangeofControlMember_6eb5328f-1ec1-4bfa-a3a3-8c4908ae0302" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_36acc88a-6773-4414-9c8e-c90c88b75884" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_36acc88a-6773-4414-9c8e-c90c88b75884" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_36acc88a-6773-4414-9c8e-c90c88b75884_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_36acc88a-6773-4414-9c8e-c90c88b75884" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_36acc88a-6773-4414-9c8e-c90c88b75884_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d48631ea-9140-4b0f-8f98-f677ae4c8654" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_36acc88a-6773-4414-9c8e-c90c88b75884" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d48631ea-9140-4b0f-8f98-f677ae4c8654" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ffcc8e0c-b346-45b9-8a61-dc4dc44f1526" xlink:to="loc_us-gaap_VariableRateAxis_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed" xlink:to="loc_us-gaap_VariableRateDomain_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_a2274daf-6847-4af6-930b-e309ac013f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_aa2b241e-50df-4dde-b9fd-8ad3e5af6eed" xlink:to="loc_us-gaap_VariableRateDomain_a2274daf-6847-4af6-930b-e309ac013f0b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/CommitmentsandContingenciesEmployeeBenefitPlansDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#CommitmentsandContingenciesEmployeeBenefitPlansDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/CommitmentsandContingenciesEmployeeBenefitPlansDetails" xlink:type="extended" id="i44b614dfc11944d8a7bfc96a3a2e9d7e_CommitmentsandContingenciesEmployeeBenefitPlansDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_37e66258-57be-4759-8a3b-35dacc805604" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_37e66258-57be-4759-8a3b-35dacc805604" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_b416999e-eb52-4524-bd13-9bb15a917568" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_b416999e-eb52-4524-bd13-9bb15a917568" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_0b5bc313-6b8e-497c-b3e2-644202255859" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_0b5bc313-6b8e-497c-b3e2-644202255859" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DeferredCompensationArrangementEmployerContributionVestingPeriod_69844e4b-ff0c-4199-9025-1f7e2f2a5a55" xlink:href="glpi-20221231.xsd#glpi_DeferredCompensationArrangementEmployerContributionVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_glpi_DeferredCompensationArrangementEmployerContributionVestingPeriod_69844e4b-ff0c-4199-9025-1f7e2f2a5a55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_48aed55b-9409-41c7-aaea-dd43d942b1e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_48aed55b-9409-41c7-aaea-dd43d942b1e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrent_d6fe3d7b-e32f-4688-80f1-9b7099da3628" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrent_d6fe3d7b-e32f-4688-80f1-9b7099da3628" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_7b255767-0921-406c-bf41-55b6c73c179a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_7b255767-0921-406c-bf41-55b6c73c179a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_4f473ffd-dd7a-4b78-aa34-df146e2a17bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_0393b2b2-e817-4ef3-a943-7faf0c137d98" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_4f473ffd-dd7a-4b78-aa34-df146e2a17bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_06cdf9df-e2d9-4f67-8a79-b9236df9ded9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_4f473ffd-dd7a-4b78-aa34-df146e2a17bc" xlink:to="loc_srt_RangeAxis_06cdf9df-e2d9-4f67-8a79-b9236df9ded9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_06cdf9df-e2d9-4f67-8a79-b9236df9ded9_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_06cdf9df-e2d9-4f67-8a79-b9236df9ded9" xlink:to="loc_srt_RangeMember_06cdf9df-e2d9-4f67-8a79-b9236df9ded9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9906c979-5fcb-4c34-a66e-9c0ec59b76bc" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_06cdf9df-e2d9-4f67-8a79-b9236df9ded9" xlink:to="loc_srt_RangeMember_9906c979-5fcb-4c34-a66e-9c0ec59b76bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ccf87de4-c184-4351-9aa9-e97b5bf24ac8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9906c979-5fcb-4c34-a66e-9c0ec59b76bc" xlink:to="loc_srt_MaximumMember_ccf87de4-c184-4351-9aa9-e97b5bf24ac8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended" id="icb857a5f8fa443af83b7795a2bc0636b_RevenueRecognitionNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRealEstateProperties_b21f087c-bb8a-46ad-9330-f6fa9337d547" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRealEstateProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_b21f087c-bb8a-46ad-9330-f6fa9337d547" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_def813e2-f75e-451b-9c7a-1d790ba9a77b" xlink:href="glpi-20221231.xsd#glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_def813e2-f75e-451b-9c7a-1d790ba9a77b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesannualrentalescalationpercentage_67a2e5f2-c950-4b6b-be56-23bf5f3b0989" xlink:href="glpi-20221231.xsd#glpi_Operatingleasesannualrentalescalationpercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_Operatingleasesannualrentalescalationpercentage_67a2e5f2-c950-4b6b-be56-23bf5f3b0989" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_bd52ddab-0845-40e0-a86b-805ed24b456a" xlink:href="glpi-20221231.xsd#glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_bd52ddab-0845-40e0-a86b-805ed24b456a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_7f1e7af3-de37-41f0-89d1-68f1c80b8349" xlink:href="glpi-20221231.xsd#glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_7f1e7af3-de37-41f0-89d1-68f1c80b8349" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues_11110aaf-c700-4e19-bef3-bb3ebde3389a" xlink:href="glpi-20221231.xsd#glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues_11110aaf-c700-4e19-bef3-bb3ebde3389a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease_cd468e4b-f6ce-4b3f-9b2c-ad80b19d178b" xlink:href="glpi-20221231.xsd#glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease_cd468e4b-f6ce-4b3f-9b2c-ad80b19d178b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_f70bb9bb-2ea4-4e4b-8428-7b56df9b846a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_f70bb9bb-2ea4-4e4b-8428-7b56df9b846a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_c37d81f0-1011-403b-8974-d16555196b14" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear5AndYear6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_c37d81f0-1011-403b-8974-d16555196b14" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_f0c156f3-0a0c-4641-82a4-6e70975e0655" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear7AndYear8"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_f0c156f3-0a0c-4641-82a4-6e70975e0655" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_6c63c667-02e7-4449-b850-6da041cfba5d" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorAfterYear9"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_6c63c667-02e7-4449-b850-6da041cfba5d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_642e029b-39b2-4af4-93f3-a839c5879143" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear2Through5"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_642e029b-39b2-4af4-93f3-a839c5879143" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear6And7_05f5b010-b464-4fe7-b2ef-cf2bf8939fc1" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear6And7"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear6And7_05f5b010-b464-4fe7-b2ef-cf2bf8939fc1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_413ac131-f09d-4f92-8364-a04f3108f518" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear8AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_413ac131-f09d-4f92-8364-a04f3108f518" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_34872833-067c-4cd9-b168-574a35a7a2ac" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_34872833-067c-4cd9-b168-574a35a7a2ac" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_ab0aadef-3067-4518-bac2-dd90d2a8d886" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_ab0aadef-3067-4518-bac2-dd90d2a8d886" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_7f0f1a5d-7b87-49ce-b540-e4d71b3492e0" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_7f0f1a5d-7b87-49ce-b540-e4d71b3492e0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_8d465433-ed7e-42ff-8bc8-dd9f9a6138e0" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_8d465433-ed7e-42ff-8bc8-dd9f9a6138e0" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_84fecde9-4aa2-4fff-af2e-321a94c00d84" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear1Through6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_84fecde9-4aa2-4fff-af2e-321a94c00d84" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear7AndAfter_d5d19388-8bc6-4a30-9b74-bac7f191ad30" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear7AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear7AndAfter_d5d19388-8bc6-4a30-9b74-bac7f191ad30" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through4_06ff3f66-cd49-42ab-82bc-797c1a5f1c3a" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear2Through4"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through4_06ff3f66-cd49-42ab-82bc-797c1a5f1c3a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndAfter_13bb9e17-925f-4ef6-9b9d-9d2495396fb3" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseRentEscalatorYear5AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndAfter_13bb9e17-925f-4ef6-9b9d-9d2495396fb3" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfMiles_1eb28df1-8eea-4b75-8814-e8ea48a52922" xlink:href="glpi-20221231.xsd#glpi_NumberOfMiles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_NumberOfMiles_1eb28df1-8eea-4b75-8814-e8ea48a52922" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_60b008bb-e103-4a59-bf3a-6afa42843a31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_60b008bb-e103-4a59-bf3a-6afa42843a31" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods_8f6e3d43-a976-4b82-8896-d5a7da43f7fc" xlink:href="glpi-20221231.xsd#glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods_8f6e3d43-a976-4b82-8896-d5a7da43f7fc" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_a65cfe52-fd55-4936-82ce-91b53d700448" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_a65cfe52-fd55-4936-82ce-91b53d700448" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_cb071085-6759-4d0e-a1a1-a4b05c82caba" xlink:href="glpi-20221231.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_cb071085-6759-4d0e-a1a1-a4b05c82caba" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_3982d055-a759-4b00-80e8-b8b1a658bdfd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_Revenues_3982d055-a759-4b00-80e8-b8b1a658bdfd" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansCommercialRealEstate_a3c25d7f-23d4-4ae8-b8d7-0c6b54bc13b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansCommercialRealEstate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansCommercialRealEstate_a3c25d7f-23d4-4ae8-b8d7-0c6b54bc13b9" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired_b9b3c5e9-a655-483b-9fef-6cb722b9915f" xlink:href="glpi-20221231.xsd#glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_glpi_NoncashOrPartNoncashAcquisitionGainLossOnAssetsAcquired_b9b3c5e9-a655-483b-9fef-6cb722b9915f" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_00c59328-f636-48be-a274-8f36315ffdb7" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:to="loc_us-gaap_LeaseContractualTermAxis_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb" xlink:to="loc_us-gaap_LeaseContractualTermDomain_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_383e63a4-50bb-4a13-80ad-a2cfba9c1bcb" xlink:to="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_247c4749-64a8-48bc-9593-5cbd4f0c013c" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_247c4749-64a8-48bc-9593-5cbd4f0c013c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_3d6b1d5e-f3d6-4d88-b036-ceba67238d6a" xlink:href="glpi-20221231.xsd#glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_3d6b1d5e-f3d6-4d88-b036-ceba67238d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoMasterLeaseMember_2aa63ecf-0c62-4865-8e4e-06c42ce9be77" xlink:href="glpi-20221231.xsd#glpi_EldoradoMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_EldoradoMasterLeaseMember_2aa63ecf-0c62-4865-8e4e-06c42ce9be77" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMasterLeaseMember_15872367-b7cc-445a-be78-1d4c46039e5f" xlink:href="glpi-20221231.xsd#glpi_BoydGamingCorporationMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_BoydGamingCorporationMasterLeaseMember_15872367-b7cc-445a-be78-1d4c46039e5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_e426f9ba-32da-466d-a2d2-e97836158769" xlink:href="glpi-20221231.xsd#glpi_AmendedAndRestatedCaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_e426f9ba-32da-466d-a2d2-e97836158769" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraParkLeaseMember_d87c4210-c9fc-4628-8500-f04a768b9989" xlink:href="glpi-20221231.xsd#glpi_BelterraParkLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_BelterraParkLeaseMember_d87c4210-c9fc-4628-8500-f04a768b9989" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceLeaseMember_3b12ac02-1b1a-4b40-8042-e89cee830b4f" xlink:href="glpi-20221231.xsd#glpi_LumierePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_LumierePlaceLeaseMember_3b12ac02-1b1a-4b40-8042-e89cee830b4f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_aef58b60-308a-4cf4-902f-e3ab631881d0" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingInc.MeadowsLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_aef58b60-308a-4cf4-902f-e3ab631881d0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownLeaseMember_f89bef37-39fd-4373-a1b7-ea69d370823f" xlink:href="glpi-20221231.xsd#glpi_MorgantownLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_MorgantownLeaseMember_f89bef37-39fd-4373-a1b7-ea69d370823f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMasterLeaseMember_a6cc8393-7f9a-47fb-bca3-e97a2eea67ce" xlink:href="glpi-20221231.xsd#glpi_CasinoQueenMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_CasinoQueenMasterLeaseMember_a6cc8393-7f9a-47fb-bca3-e97a2eea67ce" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PerryvilleLeaseMember_17eb59e7-8e69-4203-b725-7eed70a07247" xlink:href="glpi-20221231.xsd#glpi_PerryvilleLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_PerryvilleLeaseMember_17eb59e7-8e69-4203-b725-7eed70a07247" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_a30786cc-d4b7-4fec-b939-54e7e74e2e1b" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_BallysMasterLeaseMember_a30786cc-d4b7-4fec-b939-54e7e74e2e1b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_0c364226-f72d-4054-b283-62f9368a12d5" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_0c364226-f72d-4054-b283-62f9368a12d5" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_67ac94a7-2070-4019-ae68-19fc3992dc6a" xlink:href="glpi-20221231.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_PALiveMasterLeaseMember_67ac94a7-2070-4019-ae68-19fc3992dc6a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaLasVegasMember_b20b8d6f-66f4-49ab-8017-4ff9d7d82ece" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_604c1a7b-e4f7-4160-9b81-0058aa485284" xlink:to="loc_glpi_BallysTropicanaLasVegasMember_b20b8d6f-66f4-49ab-8017-4ff9d7d82ece" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_1deeb07c-9925-4ae0-9348-b4dc2e20ba90" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:to="loc_srt_MajorCustomersAxis_1deeb07c-9925-4ae0-9348-b4dc2e20ba90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_1deeb07c-9925-4ae0-9348-b4dc2e20ba90_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_1deeb07c-9925-4ae0-9348-b4dc2e20ba90" xlink:to="loc_srt_NameOfMajorCustomerDomain_1deeb07c-9925-4ae0-9348-b4dc2e20ba90_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_02c2d68b-7056-4c9f-bf64-89ef3b0bf981" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_1deeb07c-9925-4ae0-9348-b4dc2e20ba90" xlink:to="loc_srt_NameOfMajorCustomerDomain_02c2d68b-7056-4c9f-bf64-89ef3b0bf981" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysCorporationMember_bddde75c-852d-407a-8d8a-7f4c8654f4c5" xlink:href="glpi-20221231.xsd#glpi_BallysCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_02c2d68b-7056-4c9f-bf64-89ef3b0bf981" xlink:to="loc_glpi_BallysCorporationMember_bddde75c-852d-407a-8d8a-7f4c8654f4c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_517a9be1-0dd4-4a6f-be91-fa302061b3ca" xlink:href="glpi-20221231.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_02c2d68b-7056-4c9f-bf64-89ef3b0bf981" xlink:to="loc_glpi_PALiveMasterLeaseMember_517a9be1-0dd4-4a6f-be91-fa302061b3ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMember_5f567edd-e22f-46cf-9a3b-052a020c7f51" xlink:href="glpi-20221231.xsd#glpi_CasinoQueenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_02c2d68b-7056-4c9f-bf64-89ef3b0bf981" xlink:to="loc_glpi_CasinoQueenMember_5f567edd-e22f-46cf-9a3b-052a020c7f51" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_986e163c-a058-4d3d-852c-c3078af43cf1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_986e163c-a058-4d3d-852c-c3078af43cf1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_986e163c-a058-4d3d-852c-c3078af43cf1_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_986e163c-a058-4d3d-852c-c3078af43cf1" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_986e163c-a058-4d3d-852c-c3078af43cf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_d721b173-6895-47bc-8dbb-6e0af1c92b34" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_986e163c-a058-4d3d-852c-c3078af43cf1" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_d721b173-6895-47bc-8dbb-6e0af1c92b34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember_7b110cc5-847c-427a-bd77-c3dd9b4977a1" xlink:href="glpi-20221231.xsd#glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_d721b173-6895-47bc-8dbb-6e0af1c92b34" xlink:to="loc_glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember_7b110cc5-847c-427a-bd77-c3dd9b4977a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember_52b9d7a2-e534-4e9a-87d0-90fe8d2dbaed" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_d721b173-6895-47bc-8dbb-6e0af1c92b34" xlink:to="loc_glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember_52b9d7a2-e534-4e9a-87d0-90fe8d2dbaed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_167ca1ea-630a-4d75-a642-415ef01a941e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a7ce13ee-db2e-4bb4-8ced-196462f9fdb1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_167ca1ea-630a-4d75-a642-415ef01a941e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEntertainmentMember_74fb457d-45c2-4060-8659-5d7ca9fbf1f4" xlink:href="glpi-20221231.xsd#glpi_TropicanaEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_167ca1ea-630a-4d75-a642-415ef01a941e" xlink:to="loc_glpi_TropicanaEntertainmentMember_74fb457d-45c2-4060-8659-5d7ca9fbf1f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8706714e-f478-4d99-b3c2-622ab07c5a0e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_b9d0eb7f-a802-408f-9b6a-634e4e45cbe5" xlink:to="loc_srt_ProductOrServiceAxis_8706714e-f478-4d99-b3c2-622ab07c5a0e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8706714e-f478-4d99-b3c2-622ab07c5a0e_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8706714e-f478-4d99-b3c2-622ab07c5a0e" xlink:to="loc_srt_ProductsAndServicesDomain_8706714e-f478-4d99-b3c2-622ab07c5a0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c30898a8-e39f-4605-90d5-92a91688ae51" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8706714e-f478-4d99-b3c2-622ab07c5a0e" xlink:to="loc_srt_ProductsAndServicesDomain_c30898a8-e39f-4605-90d5-92a91688ae51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_GamingfoodbeverageandotherMember_43e2f0aa-71db-4ae0-b42e-5230d779034a" xlink:href="glpi-20221231.xsd#glpi_GamingfoodbeverageandotherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c30898a8-e39f-4605-90d5-92a91688ae51" xlink:to="loc_glpi_GamingfoodbeverageandotherMember_43e2f0aa-71db-4ae0-b42e-5230d779034a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RevenueRecognitionRevenueRecognitionRentalIncomeTableDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#RevenueRecognitionRevenueRecognitionRentalIncomeTableDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RevenueRecognitionRevenueRecognitionRentalIncomeTableDetails" xlink:type="extended" id="ie6567b5dd693449ab4c80e9b0578d872_RevenueRecognitionRevenueRecognitionRentalIncomeTableDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeasedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseCashRentReceived_d0104f00-e676-4222-b49b-9d931f21dcc3" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_d0104f00-e676-4222-b49b-9d931f21dcc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StraightLineRentAdjustments_d233888a-01df-443b-8207-76ffd1369450" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StraightLineRentAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_us-gaap_StraightLineRentAdjustments_d233888a-01df-443b-8207-76ffd1369450" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseGroundLeaseIncome_bb668b80-ab74-49e4-9a55-084b15911b61" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseGroundLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_glpi_OperatingLeaseGroundLeaseIncome_bb668b80-ab74-49e4-9a55-084b15911b61" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_dac9f98f-3a1f-4830-a9dd-2e956d98d3cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInFinanceReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_dac9f98f-3a1f-4830-a9dd-2e956d98d3cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseOtherRentalRevenue_f634b5a8-66b4-4042-bc64-31d88ea0f180" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseOtherRentalRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_glpi_OperatingLeaseOtherRentalRevenue_f634b5a8-66b4-4042-bc64-31d88ea0f180" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_54ace195-b110-4037-af0b-177afa2ba062" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_us-gaap_Revenues_54ace195-b110-4037-af0b-177afa2ba062" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_f67f0c42-7d7b-4fad-b6e9-419c50284fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_140120c9-95b5-4679-9dae-d479c60c7405" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_f67f0c42-7d7b-4fad-b6e9-419c50284fc8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2b47df80-6ddf-462a-ae6d-fc29924b0c37" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_f67f0c42-7d7b-4fad-b6e9-419c50284fc8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2b47df80-6ddf-462a-ae6d-fc29924b0c37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2b47df80-6ddf-462a-ae6d-fc29924b0c37_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2b47df80-6ddf-462a-ae6d-fc29924b0c37" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2b47df80-6ddf-462a-ae6d-fc29924b0c37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e8f4615e-6b6f-4c59-bf07-6f44778d8f76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2b47df80-6ddf-462a-ae6d-fc29924b0c37" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e8f4615e-6b6f-4c59-bf07-6f44778d8f76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_78f994c5-bee5-407b-962a-a80391d96b7d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e8f4615e-6b6f-4c59-bf07-6f44778d8f76" xlink:to="loc_us-gaap_BuildingMember_78f994c5-bee5-407b-962a-a80391d96b7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_d0136469-cff2-43f0-8b29-7bc30a8c900b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e8f4615e-6b6f-4c59-bf07-6f44778d8f76" xlink:to="loc_us-gaap_LandMember_d0136469-cff2-43f0-8b29-7bc30a8c900b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_ff0c307f-bc86-425b-9b1e-a88f246a9b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_f67f0c42-7d7b-4fad-b6e9-419c50284fc8" xlink:to="loc_us-gaap_LeaseContractualTermAxis_ff0c307f-bc86-425b-9b1e-a88f246a9b2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_ff0c307f-bc86-425b-9b1e-a88f246a9b2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ff0c307f-bc86-425b-9b1e-a88f246a9b2f" xlink:to="loc_us-gaap_LeaseContractualTermDomain_ff0c307f-bc86-425b-9b1e-a88f246a9b2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_519a0899-6374-4b4a-852d-ee2d28008297" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_ff0c307f-bc86-425b-9b1e-a88f246a9b2f" xlink:to="loc_us-gaap_LeaseContractualTermDomain_519a0899-6374-4b4a-852d-ee2d28008297" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BaseRentIncomeMember_cad512fe-e45c-4edd-926b-9d3f63270c5c" xlink:href="glpi-20221231.xsd#glpi_BaseRentIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_519a0899-6374-4b4a-852d-ee2d28008297" xlink:to="loc_glpi_BaseRentIncomeMember_cad512fe-e45c-4edd-926b-9d3f63270c5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_VariableRentIncomeMember_a943ee84-22a1-48f7-9438-79e4cf76ffe7" xlink:href="glpi-20221231.xsd#glpi_VariableRentIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_519a0899-6374-4b4a-852d-ee2d28008297" xlink:to="loc_glpi_VariableRentIncomeMember_a943ee84-22a1-48f7-9438-79e4cf76ffe7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended" id="i2214886dda2b4a1e859edf2074a3b8ca_StockBasedCompensationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_5f9fbd70-04c9-489e-9164-20c472a3ada3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_5f9fbd70-04c9-489e-9164-20c472a3ada3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4837e309-8a3d-42d9-9b2e-15df07f67e95" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4837e309-8a3d-42d9-9b2e-15df07f67e95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_2db63541-5079-4ddc-980b-1c9b94b7f93f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_2db63541-5079-4ddc-980b-1c9b94b7f93f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_d30ebbaa-d52f-4574-8bef-70887db7d94b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_d30ebbaa-d52f-4574-8bef-70887db7d94b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_f83785e8-0805-4392-b154-befe6e99caa7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_f83785e8-0805-4392-b154-befe6e99caa7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_1d0c5cf0-e8bf-4b07-9226-b9b2f539c343" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_1d0c5cf0-e8bf-4b07-9226-b9b2f539c343" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased_2169ecd9-4636-4e4f-aaa6-5899631e7515" xlink:href="glpi-20221231.xsd#glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased_2169ecd9-4636-4e4f-aaa6-5899631e7515" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured_b6e37dd2-b1fd-4fc2-a496-4e81c2f5fa3b" xlink:href="glpi-20221231.xsd#glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured_b6e37dd2-b1fd-4fc2-a496-4e81c2f5fa3b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_db2e99a7-5de7-4cfe-9da0-b1d2bebaf95e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4521f35-0bdc-4bf2-bb79-378c8ada17cf" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_db2e99a7-5de7-4cfe-9da0-b1d2bebaf95e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_5e6c38f5-b832-42ec-816b-c161f180da99" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_db2e99a7-5de7-4cfe-9da0-b1d2bebaf95e" xlink:to="loc_us-gaap_AwardTypeAxis_5e6c38f5-b832-42ec-816b-c161f180da99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5e6c38f5-b832-42ec-816b-c161f180da99_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_5e6c38f5-b832-42ec-816b-c161f180da99" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5e6c38f5-b832-42ec-816b-c161f180da99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b89cbcfc-7f5b-454a-aa14-ca7149d24a37" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_5e6c38f5-b832-42ec-816b-c161f180da99" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b89cbcfc-7f5b-454a-aa14-ca7149d24a37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_441a16a8-5f95-41ca-a735-e4082ecdf82c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b89cbcfc-7f5b-454a-aa14-ca7149d24a37" xlink:to="loc_us-gaap_RestrictedStockMember_441a16a8-5f95-41ca-a735-e4082ecdf82c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_3da0a65b-6235-45fb-bfd4-3e73d8b661e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b89cbcfc-7f5b-454a-aa14-ca7149d24a37" xlink:to="loc_us-gaap_PerformanceSharesMember_3da0a65b-6235-45fb-bfd4-3e73d8b661e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_e0cafb89-256a-4eaa-abea-d6521bd45df9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_db2e99a7-5de7-4cfe-9da0-b1d2bebaf95e" xlink:to="loc_us-gaap_VestingAxis_e0cafb89-256a-4eaa-abea-d6521bd45df9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_e0cafb89-256a-4eaa-abea-d6521bd45df9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_e0cafb89-256a-4eaa-abea-d6521bd45df9" xlink:to="loc_us-gaap_VestingDomain_e0cafb89-256a-4eaa-abea-d6521bd45df9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_c62d350d-cac8-4801-98b2-bf67712a0734" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_e0cafb89-256a-4eaa-abea-d6521bd45df9" xlink:to="loc_us-gaap_VestingDomain_c62d350d-cac8-4801-98b2-bf67712a0734" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EndOfMeasurementPeriodVestingMember_19f46794-3594-45d5-b983-2aa2f1d52eeb" xlink:href="glpi-20221231.xsd#glpi_EndOfMeasurementPeriodVestingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_c62d350d-cac8-4801-98b2-bf67712a0734" xlink:to="loc_glpi_EndOfMeasurementPeriodVestingMember_19f46794-3594-45d5-b983-2aa2f1d52eeb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationRestrictedStockAwardActivityDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#StockBasedCompensationRestrictedStockAwardActivityDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationRestrictedStockAwardActivityDetails" xlink:type="extended" id="i76b307ed626845f1ac77eb163be44071_StockBasedCompensationRestrictedStockAwardActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3a4f1043-bbd9-42e7-95e3-b8cb2d98c674" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3a4f1043-bbd9-42e7-95e3-b8cb2d98c674" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_8109df17-a5cf-4edb-aa01-642fa161ed74" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_8109df17-a5cf-4edb-aa01-642fa161ed74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_98008fb6-3599-468e-b6ee-dbceaf48236d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_98008fb6-3599-468e-b6ee-dbceaf48236d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_077b6842-29ae-47e7-8f2e-f2e3329e1f9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_077b6842-29ae-47e7-8f2e-f2e3329e1f9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_d8366f42-1250-4c19-93df-460540f8d89e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_e677e233-22ee-4577-baba-32183f7f2bb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_d8366f42-1250-4c19-93df-460540f8d89e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_c821070b-5437-4a67-b171-ea72dd5f3bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3a4f1043-bbd9-42e7-95e3-b8cb2d98c674" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6fa13390-ab57-41e2-820b-e7afd9807f15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6fa13390-ab57-41e2-820b-e7afd9807f15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_04ace87f-5b96-4b3e-accf-a42ec71fe042" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_04ace87f-5b96-4b3e-accf-a42ec71fe042" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5d83faca-5501-465f-918b-3ae650560c83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5d83faca-5501-465f-918b-3ae650560c83" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_37519be8-658c-4f79-9033-3e7a0a26b5d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3a19d98a-0a3f-450b-98af-b9a7cab665ab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_37519be8-658c-4f79-9033-3e7a0a26b5d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_eb6cb798-ca5f-480c-804f-33c528b6a746" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b83b6a7b-eb1a-4e81-8afc-dc6fcee40b66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3a4f1043-bbd9-42e7-95e3-b8cb2d98c674" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b83b6a7b-eb1a-4e81-8afc-dc6fcee40b66" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_b5188f40-2a90-44ef-9302-8c173b9de7c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b83b6a7b-eb1a-4e81-8afc-dc6fcee40b66" xlink:to="loc_us-gaap_AwardTypeAxis_b5188f40-2a90-44ef-9302-8c173b9de7c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b5188f40-2a90-44ef-9302-8c173b9de7c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_b5188f40-2a90-44ef-9302-8c173b9de7c4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b5188f40-2a90-44ef-9302-8c173b9de7c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02ea6eba-d87a-40d4-977f-686df4b50f32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_b5188f40-2a90-44ef-9302-8c173b9de7c4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02ea6eba-d87a-40d4-977f-686df4b50f32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_e05b4cf3-5593-4049-ab13-e42592310f16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02ea6eba-d87a-40d4-977f-686df4b50f32" xlink:to="loc_us-gaap_RestrictedStockMember_e05b4cf3-5593-4049-ab13-e42592310f16" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationPerformanceBasedRestrictedStockAwardsActivityDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#StockBasedCompensationPerformanceBasedRestrictedStockAwardsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationPerformanceBasedRestrictedStockAwardsActivityDetails" xlink:type="extended" id="i96e9f8d9dd144ffbb97cd3dac197d3f7_StockBasedCompensationPerformanceBasedRestrictedStockAwardsActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7a892645-27ec-4db1-ae95-13124f443174" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7a892645-27ec-4db1-ae95-13124f443174" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_cc61aa24-8869-48bd-9db6-4d673cafcad5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_cc61aa24-8869-48bd-9db6-4d673cafcad5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_74aab75a-5599-4bcf-8361-3c6d70c48300" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_74aab75a-5599-4bcf-8361-3c6d70c48300" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_700e28ce-0fe9-48ac-9160-3ac937e0edf4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_700e28ce-0fe9-48ac-9160-3ac937e0edf4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_4467a429-d32a-4d49-be37-e5ec2e1382b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_730f7311-21c9-4a76-83f6-e67264d20520" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_4467a429-d32a-4d49-be37-e5ec2e1382b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_05af8b04-7274-488b-89ba-3dd2f483337d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7a892645-27ec-4db1-ae95-13124f443174" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d3af2b2a-2afe-45d9-90d1-e193b21c12d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d3af2b2a-2afe-45d9-90d1-e193b21c12d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bf7760be-9a7b-4382-9c8a-aff11e6eebdc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bf7760be-9a7b-4382-9c8a-aff11e6eebdc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_db5226b6-e525-4905-854d-145208c55dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_db5226b6-e525-4905-854d-145208c55dfa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1e47e87e-ed5f-42a4-bf64-93d7f89a5831" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_c457d5d3-2f10-40d5-b159-d740e0fd0c88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1e47e87e-ed5f-42a4-bf64-93d7f89a5831" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_50a74b89-2d3b-4b2f-962e-a7e98284e71c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_98cc2190-4051-4291-973d-a111cd81f08f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7a892645-27ec-4db1-ae95-13124f443174" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_98cc2190-4051-4291-973d-a111cd81f08f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_9d5ad271-699b-4b74-a383-77fc92275511" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_98cc2190-4051-4291-973d-a111cd81f08f" xlink:to="loc_us-gaap_AwardTypeAxis_9d5ad271-699b-4b74-a383-77fc92275511" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d5ad271-699b-4b74-a383-77fc92275511_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_9d5ad271-699b-4b74-a383-77fc92275511" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d5ad271-699b-4b74-a383-77fc92275511_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_360b7945-bcd1-413f-ad6b-2dec1d50efa0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_9d5ad271-699b-4b74-a383-77fc92275511" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_360b7945-bcd1-413f-ad6b-2dec1d50efa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_da76386e-55a0-4018-84aa-e074b2986799" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_360b7945-bcd1-413f-ad6b-2dec1d50efa0" xlink:to="loc_us-gaap_PerformanceSharesMember_da76386e-55a0-4018-84aa-e074b2986799" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/EarningsPerShareEarningsPerShareWeightedAverageCommonSharesOutstandingDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#EarningsPerShareEarningsPerShareWeightedAverageCommonSharesOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/EarningsPerShareEarningsPerShareWeightedAverageCommonSharesOutstandingDetails" xlink:type="extended" id="ia3d6f747d120429682828db21a73d81c_EarningsPerShareEarningsPerShareWeightedAverageCommonSharesOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_182983e6-e5b8-4388-9fb3-acef670531eb" xlink:href="glpi-20221231.xsd#glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_63025fda-cf15-40e3-b7ab-47061b9501ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_182983e6-e5b8-4388-9fb3-acef670531eb" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_63025fda-cf15-40e3-b7ab-47061b9501ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_6aa0d6ff-846d-48d4-b161-e7cb898de013" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_182983e6-e5b8-4388-9fb3-acef670531eb" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_6aa0d6ff-846d-48d4-b161-e7cb898de013" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_891fa36e-9a3c-4fa4-8a41-14884f8ff40f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_182983e6-e5b8-4388-9fb3-acef670531eb" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_891fa36e-9a3c-4fa4-8a41-14884f8ff40f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable_781f60c2-d6aa-481c-bfa4-6ef121171718" xlink:href="glpi-20221231.xsd#glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_182983e6-e5b8-4388-9fb3-acef670531eb" xlink:to="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable_781f60c2-d6aa-481c-bfa4-6ef121171718" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_89c21798-8aa9-4e35-a527-0a2c5f7272e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable_781f60c2-d6aa-481c-bfa4-6ef121171718" xlink:to="loc_us-gaap_AwardTypeAxis_89c21798-8aa9-4e35-a527-0a2c5f7272e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_89c21798-8aa9-4e35-a527-0a2c5f7272e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_89c21798-8aa9-4e35-a527-0a2c5f7272e7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_89c21798-8aa9-4e35-a527-0a2c5f7272e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4753bf4e-945d-4777-83bd-b7bc96985d84" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_89c21798-8aa9-4e35-a527-0a2c5f7272e7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4753bf4e-945d-4777-83bd-b7bc96985d84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_68686da8-21c4-4b6f-9a97-c6300c4e3091" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4753bf4e-945d-4777-83bd-b7bc96985d84" xlink:to="loc_us-gaap_RestrictedStockMember_68686da8-21c4-4b6f-9a97-c6300c4e3091" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_9f204898-b8cb-4bb0-957d-0b6f70764b28" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4753bf4e-945d-4777-83bd-b7bc96985d84" xlink:to="loc_us-gaap_PerformanceSharesMember_9f204898-b8cb-4bb0-957d-0b6f70764b28" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ShareholdersEquityCommonStockDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#ShareholdersEquityCommonStockDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ShareholdersEquityCommonStockDetails" xlink:type="extended" id="i609b3060203d4280a269a852b6754b95_ShareholdersEquityCommonStockDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares_aa2404c4-8be4-4719-90cd-6caa85b9e64a" xlink:href="glpi-20221231.xsd#glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares_aa2404c4-8be4-4719-90cd-6caa85b9e64a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold_e7c4c146-06ab-48f7-847c-c49f3e7fcc40" xlink:href="glpi-20221231.xsd#glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold_e7c4c146-06ab-48f7-847c-c49f3e7fcc40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock_2540a5ec-6fb5-4d22-9dba-d1cefb8a2896" xlink:href="glpi-20221231.xsd#glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock_2540a5ec-6fb5-4d22-9dba-d1cefb8a2896" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_287fddd3-e844-47a1-9c11-dc29e50430a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_287fddd3-e844-47a1-9c11-dc29e50430a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StockIssuedDuringPeriodPricePerShare_191dc74f-8a78-4828-adc1-dead3dbdfc25" xlink:href="glpi-20221231.xsd#glpi_StockIssuedDuringPeriodPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_StockIssuedDuringPeriodPricePerShare_191dc74f-8a78-4828-adc1-dead3dbdfc25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_WeightedAveragePriceofSharesIssued_bcbb2756-2ead-4a66-813d-ea5692428e07" xlink:href="glpi-20221231.xsd#glpi_WeightedAveragePriceofSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_WeightedAveragePriceofSharesIssued_bcbb2756-2ead-4a66-813d-ea5692428e07" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_2e4519a7-b377-4196-b046-4a965e460825" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_2e4519a7-b377-4196-b046-4a965e460825" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockCommonStockValueRemainingUnderAmountAuthorizedtobeIssued_a37db161-2d37-46ff-8c22-5cf9ed4797e7" xlink:href="glpi-20221231.xsd#glpi_SaleOfStockCommonStockValueRemainingUnderAmountAuthorizedtobeIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_glpi_SaleOfStockCommonStockValueRemainingUnderAmountAuthorizedtobeIssued_a37db161-2d37-46ff-8c22-5cf9ed4797e7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_eaa6b080-e5f7-43cb-81be-3e4ee5651947" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_DividendsCommonStockCash_eaa6b080-e5f7-43cb-81be-3e4ee5651947" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockStock_446318c6-ca81-4a19-808c-578220c1cbe1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_DividendsCommonStockStock_446318c6-ca81-4a19-808c-578220c1cbe1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsShares_6ee99054-34b2-47d8-a974-ceb6ca90ca7f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_CommonStockDividendsShares_6ee99054-34b2-47d8-a974-ceb6ca90ca7f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_c1193cf2-7318-468b-bdc2-2292c80e6ef3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_SharePrice_c1193cf2-7318-468b-bdc2-2292c80e6ef3" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsShareBasedCompensation_1379ef25-e253-4fb6-b054-a3b4fa45002b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_DividendsShareBasedCompensation_1379ef25-e253-4fb6-b054-a3b4fa45002b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_553fbd70-ad56-42a3-bf05-a660016e461b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_553fbd70-ad56-42a3-bf05-a660016e461b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_ea3d7493-3e72-4a8d-bb28-02feb1287f77" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_ea3d7493-3e72-4a8d-bb28-02feb1287f77" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_9ebbeb2a-253c-4681-95fe-a6221404abbf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_9ebbeb2a-253c-4681-95fe-a6221404abbf" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_50f165ac-4f5a-4c3e-a5f3-3b11e11da713" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_b5b2c61e-fb1d-48c1-adee-06fe63a928b6" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_50f165ac-4f5a-4c3e-a5f3-3b11e11da713" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_55f03e1d-5ec2-4e21-92ad-53bce081212f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_50f165ac-4f5a-4c3e-a5f3-3b11e11da713" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_55f03e1d-5ec2-4e21-92ad-53bce081212f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_55f03e1d-5ec2-4e21-92ad-53bce081212f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_55f03e1d-5ec2-4e21-92ad-53bce081212f" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_55f03e1d-5ec2-4e21-92ad-53bce081212f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_25ca3da6-d1aa-4cf7-a39e-813bcc6cfcb2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_55f03e1d-5ec2-4e21-92ad-53bce081212f" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_25ca3da6-d1aa-4cf7-a39e-813bcc6cfcb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AtTheMarketProgramMember_c09eaaa5-9e30-435c-8454-3fd4bbcf06a3" xlink:href="glpi-20221231.xsd#glpi_AtTheMarketProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_25ca3da6-d1aa-4cf7-a39e-813bcc6cfcb2" xlink:to="loc_glpi_AtTheMarketProgramMember_c09eaaa5-9e30-435c-8454-3fd4bbcf06a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_82c3006b-1c9f-46b0-875d-98d9b50e384f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_50f165ac-4f5a-4c3e-a5f3-3b11e11da713" xlink:to="loc_us-gaap_DividendsAxis_82c3006b-1c9f-46b0-875d-98d9b50e384f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_82c3006b-1c9f-46b0-875d-98d9b50e384f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_82c3006b-1c9f-46b0-875d-98d9b50e384f" xlink:to="loc_us-gaap_DividendsDomain_82c3006b-1c9f-46b0-875d-98d9b50e384f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_5859426b-c1c8-4679-8902-38f59546280d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_82c3006b-1c9f-46b0-875d-98d9b50e384f" xlink:to="loc_us-gaap_DividendsDomain_5859426b-c1c8-4679-8902-38f59546280d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CompanyEmployeeMember_253dd898-18bc-4201-9113-a5adca2ae504" xlink:href="glpi-20221231.xsd#glpi_CompanyEmployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_5859426b-c1c8-4679-8902-38f59546280d" xlink:to="loc_glpi_CompanyEmployeeMember_253dd898-18bc-4201-9113-a5adca2ae504" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_a7984f4d-ecf1-44f0-b700-253e0d09d7c9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_50f165ac-4f5a-4c3e-a5f3-3b11e11da713" xlink:to="loc_srt_OwnershipAxis_a7984f4d-ecf1-44f0-b700-253e0d09d7c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_a7984f4d-ecf1-44f0-b700-253e0d09d7c9_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_a7984f4d-ecf1-44f0-b700-253e0d09d7c9" xlink:to="loc_srt_OwnershipDomain_a7984f4d-ecf1-44f0-b700-253e0d09d7c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_13c358bd-b9ca-4329-87aa-fc52a1e70a3c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_a7984f4d-ecf1-44f0-b700-253e0d09d7c9" xlink:to="loc_srt_OwnershipDomain_13c358bd-b9ca-4329-87aa-fc52a1e70a3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_dc817237-7697-4839-8217-0350caec7b57" xlink:href="glpi-20221231.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_13c358bd-b9ca-4329-87aa-fc52a1e70a3c" xlink:to="loc_glpi_TheCordishCompaniesMember_dc817237-7697-4839-8217-0350caec7b57" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ShareholdersEquityDividendsDeclaredandPaidDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#ShareholdersEquityDividendsDeclaredandPaidDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ShareholdersEquityDividendsDeclaredandPaidDetails" xlink:type="extended" id="ibb5cfbf0c55048ddb9409c7f2063a511_ShareholdersEquityDividendsDeclaredandPaidDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:href="glpi-20221231.xsd#glpi_ScheduleOfDividendsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_bf5549c8-e5cd-4fc3-9257-01534f428f77" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_bf5549c8-e5cd-4fc3-9257-01534f428f77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_a88114b1-0f19-43c3-8dc8-4a1da9f413e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_CommonStockDividendsPerShareCashPaid_a88114b1-0f19-43c3-8dc8-4a1da9f413e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_31ebd182-02b3-4fad-9f3d-37649957f4f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_31ebd182-02b3-4fad-9f3d-37649957f4f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_783bd97a-6533-4b1f-86a3-1356f34043a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_DividendsCommonStockCash_783bd97a-6533-4b1f-86a3-1356f34043a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockStock_145fbcd7-9feb-4a9c-a9a4-6b4f8903798e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_DividendsCommonStockStock_145fbcd7-9feb-4a9c-a9a4-6b4f8903798e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsShares_686eeb1f-848d-4ff5-a070-61262e07f54d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_CommonStockDividendsShares_686eeb1f-848d-4ff5-a070-61262e07f54d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_706a339f-ab23-478d-9449-147763fc17fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_us-gaap_SharePrice_706a339f-ab23-478d-9449-147763fc17fc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleOfDividendsTable_7978a469-ace7-4358-8c67-eba2cca1b28b" xlink:href="glpi-20221231.xsd#glpi_ScheduleOfDividendsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_ScheduleOfDividendsLineItems_112ddf37-b20f-4937-b3e7-0e6d6e64a55a" xlink:to="loc_glpi_ScheduleOfDividendsTable_7978a469-ace7-4358-8c67-eba2cca1b28b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_ce0e63cd-5030-4089-abf4-38b36dded7c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_ScheduleOfDividendsTable_7978a469-ace7-4358-8c67-eba2cca1b28b" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_ce0e63cd-5030-4089-abf4-38b36dded7c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_ce0e63cd-5030-4089-abf4-38b36dded7c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_ce0e63cd-5030-4089-abf4-38b36dded7c7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_ce0e63cd-5030-4089-abf4-38b36dded7c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_e0f9f4dd-c1fa-43e9-af52-1d4474d0d5f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_ce0e63cd-5030-4089-abf4-38b36dded7c7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_e0f9f4dd-c1fa-43e9-af52-1d4474d0d5f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_0f61263f-a10c-4f9d-b06d-0586e847410f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_e0f9f4dd-c1fa-43e9-af52-1d4474d0d5f0" xlink:to="loc_us-gaap_SubsequentEventMember_0f61263f-a10c-4f9d-b06d-0586e847410f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ShareholdersEquityDividendClassificationDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#ShareholdersEquityDividendClassificationDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ShareholdersEquityDividendClassificationDetails" xlink:type="extended" id="i9705a8613c9c43088ed3006fc0bf9def_ShareholdersEquityDividendClassificationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DividendsLineItems_a4d3c38c-df06-45cc-a8de-ed63bf10b6ee" xlink:href="glpi-20221231.xsd#glpi_DividendsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_5bfbafe1-2b74-4ec0-ab2c-ff44c41bfc1c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_DividendsLineItems_a4d3c38c-df06-45cc-a8de-ed63bf10b6ee" xlink:to="loc_us-gaap_CommonStockDividendsPerShareCashPaid_5bfbafe1-2b74-4ec0-ab2c-ff44c41bfc1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CommonStockDividendsPercentofCashPaid_591a9fd9-2d7d-49f2-88a4-e86079c61454" xlink:href="glpi-20221231.xsd#glpi_CommonStockDividendsPercentofCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_DividendsLineItems_a4d3c38c-df06-45cc-a8de-ed63bf10b6ee" xlink:to="loc_glpi_CommonStockDividendsPercentofCashPaid_591a9fd9-2d7d-49f2-88a4-e86079c61454" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleOfDividendsTable_f61439ef-9685-4115-8b32-5cc252c1f1e8" xlink:href="glpi-20221231.xsd#glpi_ScheduleOfDividendsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_DividendsLineItems_a4d3c38c-df06-45cc-a8de-ed63bf10b6ee" xlink:to="loc_glpi_ScheduleOfDividendsTable_f61439ef-9685-4115-8b32-5cc252c1f1e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_ScheduleOfDividendsTable_f61439ef-9685-4115-8b32-5cc252c1f1e8" xlink:to="loc_us-gaap_DividendsAxis_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe" xlink:to="loc_us-gaap_DividendsDomain_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_a9c8cf3e-c26b-4f48-a9a1-a12c72003bfe" xlink:to="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QualifiedDividendsMember_b5c5d52d-2ac4-493f-bc0f-f43181076764" xlink:href="glpi-20221231.xsd#glpi_QualifiedDividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:to="loc_glpi_QualifiedDividendsMember_b5c5d52d-2ac4-493f-bc0f-f43181076764" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NonqualifiedDividendsMember_2793a8cb-4076-4edf-a053-7ac2f473d831" xlink:href="glpi-20221231.xsd#glpi_NonqualifiedDividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:to="loc_glpi_NonqualifiedDividendsMember_2793a8cb-4076-4edf-a053-7ac2f473d831" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CapitalGainsMember_c451344b-35c9-406f-ac7c-2a839ffa31d4" xlink:href="glpi-20221231.xsd#glpi_CapitalGainsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:to="loc_glpi_CapitalGainsMember_c451344b-35c9-406f-ac7c-2a839ffa31d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NontaxableReturnofCapitalMember_818273c1-20af-4709-b3fc-bdd5acdfecbf" xlink:href="glpi-20221231.xsd#glpi_NontaxableReturnofCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_b7102406-2f77-4907-9f8b-be502bb4d783" xlink:to="loc_glpi_NontaxableReturnofCapitalMember_818273c1-20af-4709-b3fc-bdd5acdfecbf" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SupplementalDisclosuresofCashFlowInformationandNoncashActivitiesNoncashInvestingandFinancingActivitiesDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#SupplementalDisclosuresofCashFlowInformationandNoncashActivitiesNoncashInvestingandFinancingActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SupplementalDisclosuresofCashFlowInformationandNoncashActivitiesNoncashInvestingandFinancingActivitiesDetails" xlink:type="extended" id="icf13d382a7c34565aa3ac68f146e40cf_SupplementalDisclosuresofCashFlowInformationandNoncashActivitiesNoncashInvestingandFinancingActivitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3df1b608-60c4-48fa-84fa-78dae943edad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_2a272a0f-355e-4043-bb6c-3114b641f56d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3df1b608-60c4-48fa-84fa-78dae943edad" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_2a272a0f-355e-4043-bb6c-3114b641f56d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_19b64444-53cf-4e16-a078-21bb3f80a880" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3df1b608-60c4-48fa-84fa-78dae943edad" xlink:to="loc_us-gaap_OperatingLeaseLiability_19b64444-53cf-4e16-a078-21bb3f80a880" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRentCreditsTransferred_29850938-dd3a-42dc-84a7-768d01cbc879" xlink:href="glpi-20221231.xsd#glpi_AssetAcquisitionRentCreditsTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3df1b608-60c4-48fa-84fa-78dae943edad" xlink:to="loc_glpi_AssetAcquisitionRentCreditsTransferred_29850938-dd3a-42dc-84a7-768d01cbc879" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_7fda0a0a-5a1d-4a09-8964-9de3a1238921" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3df1b608-60c4-48fa-84fa-78dae943edad" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_7fda0a0a-5a1d-4a09-8964-9de3a1238921" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_616c971f-84a5-456b-91af-87166efe233d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_7fda0a0a-5a1d-4a09-8964-9de3a1238921" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_616c971f-84a5-456b-91af-87166efe233d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_616c971f-84a5-456b-91af-87166efe233d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_616c971f-84a5-456b-91af-87166efe233d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_616c971f-84a5-456b-91af-87166efe233d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0d7e96ca-3b21-4513-bdda-4a02be142f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_616c971f-84a5-456b-91af-87166efe233d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0d7e96ca-3b21-4513-bdda-4a02be142f0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownMember_378137e3-5a28-47fe-8810-35302debec23" xlink:href="glpi-20221231.xsd#glpi_MorgantownMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0d7e96ca-3b21-4513-bdda-4a02be142f0e" xlink:to="loc_glpi_MorgantownMember_378137e3-5a28-47fe-8810-35302debec23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingIncMember_9525a17b-d716-4bff-9476-7dee55dc8e33" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0d7e96ca-3b21-4513-bdda-4a02be142f0e" xlink:to="loc_glpi_PennNationalGamingIncMember_9525a17b-d716-4bff-9476-7dee55dc8e33" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ScheduleIIIRealEstateAssetsandAccumulatedDepreciationDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#ScheduleIIIRealEstateAssetsandAccumulatedDepreciationDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ScheduleIIIRealEstateAssetsandAccumulatedDepreciationDetails" xlink:type="extended" id="ice6aedbb2fc24c598ca7650c6e4e87f3_ScheduleIIIRealEstateAssetsandAccumulatedDepreciationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances_bf0f9c65-95f4-4825-926e-de4f570e9038" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances_bf0f9c65-95f4-4825-926e-de4f570e9038" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand_670a332b-99fe-45bb-85aa-4d2981784043" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand_670a332b-99fe-45bb-85aa-4d2981784043" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements_6b8744a7-2ccc-4912-8386-dd397ad6d191" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements_6b8744a7-2ccc-4912-8386-dd397ad6d191" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts_e1999f51-7168-4f14-ace2-a8f91eb663ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts_e1999f51-7168-4f14-ace2-a8f91eb663ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand_21d8c5de-bf08-41ef-ae8d-3ce9f0f0fe0e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand_21d8c5de-bf08-41ef-ae8d-3ce9f0f0fe0e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements_dc738334-1dd3-4df0-bd66-3b765062d969" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements_dc738334-1dd3-4df0-bd66-3b765062d969" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateGrossAtCarryingValue_b6feef8f-3367-4155-8d7d-233e333f0400" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateGrossAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateGrossAtCarryingValue_b6feef8f-3367-4155-8d7d-233e333f0400" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAccumulatedDepreciation_097f9ae9-3996-4031-9fcf-17d1410885a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAccumulatedDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAccumulatedDepreciation_097f9ae9-3996-4031-9fcf-17d1410885a7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1_1a222241-1d38-4c20-a28a-32d639633796" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1_1a222241-1d38-4c20-a28a-32d639633796" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationByPropertyTable_f96db7a8-2610-491b-93da-4e5e747cee62" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationByPropertyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationLineItems_9c0f2717-8502-4997-aaaa-51e6d3f33bb9" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationByPropertyTable_f96db7a8-2610-491b-93da-4e5e747cee62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_f7f8ff56-bf47-4c95-a3e1-ed24576063b1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationByPropertyTable_f96db7a8-2610-491b-93da-4e5e747cee62" xlink:to="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_f7f8ff56-bf47-4c95-a3e1-ed24576063b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_f7f8ff56-bf47-4c95-a3e1-ed24576063b1_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_f7f8ff56-bf47-4c95-a3e1-ed24576063b1" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_f7f8ff56-bf47-4c95-a3e1-ed24576063b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_5011c90c-ee7e-4191-ad14-2535d725a305" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_f7f8ff56-bf47-4c95-a3e1-ed24576063b1" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_5011c90c-ee7e-4191-ad14-2535d725a305" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_RentalPropertiesMember_2025886b-5f34-4f19-8404-ffd8d4aac19a" xlink:href="glpi-20221231.xsd#glpi_RentalPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_5011c90c-ee7e-4191-ad14-2535d725a305" xlink:to="loc_glpi_RentalPropertiesMember_2025886b-5f34-4f19-8404-ffd8d4aac19a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9a7dd34e-8e39-4662-94da-5601a22eb2a0" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationByPropertyTable_f96db7a8-2610-491b-93da-4e5e747cee62" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9a7dd34e-8e39-4662-94da-5601a22eb2a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9a7dd34e-8e39-4662-94da-5601a22eb2a0_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9a7dd34e-8e39-4662-94da-5601a22eb2a0" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9a7dd34e-8e39-4662-94da-5601a22eb2a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9a7dd34e-8e39-4662-94da-5601a22eb2a0" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoLawrenceburgINMember_bb099488-7e2e-4685-97e4-08ea5b8fb38f" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoLawrenceburgINMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoLawrenceburgINMember_bb099488-7e2e-4685-97e4-08ea5b8fb38f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoAuroraILMember_e1108c37-0853-4780-9e90-183bfb44bbb0" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoAuroraILMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoAuroraILMember_e1108c37-0853-4780-9e90-183bfb44bbb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoJolietILMember_df507c81-fa9f-4c31-901e-570bc4f5e1b5" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoJolietILMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoJolietILMember_df507c81-fa9f-4c31-901e-570bc4f5e1b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ArgosyCasinoAltonILMember_24844bf4-5a83-4f17-902c-277127180adf" xlink:href="glpi-20221231.xsd#glpi_ArgosyCasinoAltonILMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_ArgosyCasinoAltonILMember_24844bf4-5a83-4f17-902c-277127180adf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoToledoOHMember_f9bd96d1-e1eb-4271-be25-19bf14389107" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoToledoOHMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoToledoOHMember_f9bd96d1-e1eb-4271-be25-19bf14389107" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoColumbusOHMember_bec603fd-12f0-4c3c-bfc4-a3ac80256a10" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoColumbusOHMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoColumbusOHMember_bec603fd-12f0-4c3c-bfc4-a3ac80256a10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoAtCharlesTownRacesWVMember_2ffa06cf-9d52-4ab3-b695-36ef2988c92b" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoAtCharlesTownRacesWVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoAtCharlesTownRacesWVMember_2ffa06cf-9d52-4ab3-b695-36ef2988c92b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoAtPennNationalRaceCoursePAMember_b08f2b02-8878-42a2-8e38-7982fdd73427" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoAtPennNationalRaceCoursePAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoAtPennNationalRaceCoursePAMember_b08f2b02-8878-42a2-8e38-7982fdd73427" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MResortNVMember_7d891114-4ab7-4834-9dad-470c0441342f" xlink:href="glpi-20221231.xsd#glpi_MResortNVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_MResortNVMember_7d891114-4ab7-4834-9dad-470c0441342f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBangorMEMember_b7939de3-e382-4197-9850-1f984e1d732d" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoBangorMEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoBangorMEMember_b7939de3-e382-4197-9850-1f984e1d732d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ZiaParkCasinoNMMember_527ff343-0289-4de2-8756-eee26308555e" xlink:href="glpi-20221231.xsd#glpi_ZiaParkCasinoNMMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_ZiaParkCasinoNMMember_527ff343-0289-4de2-8756-eee26308555e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoGulfCoastMSMember_ec3e8c0f-06dc-4fc2-a338-2eea7f868f1d" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoGulfCoastMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoGulfCoastMSMember_ec3e8c0f-06dc-4fc2-a338-2eea7f868f1d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ArgosyCasinoRiversideMOMember_3babe7b5-0575-40af-8919-e4d987bc4c27" xlink:href="glpi-20221231.xsd#glpi_ArgosyCasinoRiversideMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_ArgosyCasinoRiversideMOMember_3babe7b5-0575-40af-8919-e4d987bc4c27" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoTunicaMSMember_8490792f-1d78-477e-8709-f74980d12314" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoTunicaMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoTunicaMSMember_8490792f-1d78-477e-8709-f74980d12314" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoomtownBiloxiMSMember_cf66f2f9-6f15-49c1-9fcb-09e442ef004d" xlink:href="glpi-20221231.xsd#glpi_BoomtownBiloxiMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BoomtownBiloxiMSMember_cf66f2f9-6f15-49c1-9fcb-09e442ef004d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoStLouisMOMember_f5574b8b-defe-4c76-9cc3-9fd0b5df7cf1" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoStLouisMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoStLouisMOMember_f5574b8b-defe-4c76-9cc3-9fd0b5df7cf1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoatDaytonRacewayOHMember_6da6848e-3c16-44d7-86d8-70f4f05ed3cf" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoatDaytonRacewayOHMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoatDaytonRacewayOHMember_6da6848e-3c16-44d7-86d8-70f4f05ed3cf" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoatMahoningValleyRaceTrackOHMember_f2b442cb-fb9f-42da-af71-c48391a8c48c" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoatMahoningValleyRaceTrackOHMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoatMahoningValleyRaceTrackOHMember_f2b442cb-fb9f-42da-af71-c48391a8c48c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ResortsCasinoTunicaMSMember_9078a50c-d3c3-4daa-8013-7f0e69a910e5" xlink:href="glpi-20221231.xsd#glpi_ResortsCasinoTunicaMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_ResortsCasinoTunicaMSMember_9078a50c-d3c3-4daa-8013-7f0e69a910e5" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_A1stJackpotCasinoMSMember_49b09ab7-cd25-43f1-b9f7-91c0e3b79c2f" xlink:href="glpi-20221231.xsd#glpi_A1stJackpotCasinoMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_A1stJackpotCasinoMSMember_49b09ab7-cd25-43f1-b9f7-91c0e3b79c2f" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarBlackHawkCOMember_e78967aa-2402-4573-b142-90868ff22425" xlink:href="glpi-20221231.xsd#glpi_AmeristarBlackHawkCOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarBlackHawkCOMember_e78967aa-2402-4573-b142-90868ff22425" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarEastChicagoINMember_8765f760-0a51-4746-ad9a-50503eee31ab" xlink:href="glpi-20221231.xsd#glpi_AmeristarEastChicagoINMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarEastChicagoINMember_8765f760-0a51-4746-ad9a-50503eee31ab" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraCasinoResortINMember_9b1d0827-2502-4f3b-934f-c84ddd390945" xlink:href="glpi-20221231.xsd#glpi_BelterraCasinoResortINMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BelterraCasinoResortINMember_9b1d0827-2502-4f3b-934f-c84ddd390945" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarCouncilBluffsIAMember_9f40fb06-2adb-4624-a5d2-3b00fdd77a01" xlink:href="glpi-20221231.xsd#glpi_AmeristarCouncilBluffsIAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarCouncilBluffsIAMember_9f40fb06-2adb-4624-a5d2-3b00fdd77a01" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LAubergeBatonRougeLAMember_f6a62a5e-7e50-4252-ad42-fc8c4d36aff7" xlink:href="glpi-20221231.xsd#glpi_LAubergeBatonRougeLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_LAubergeBatonRougeLAMember_f6a62a5e-7e50-4252-ad42-fc8c4d36aff7" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoomtownBossierCityLAMember_8c744b00-3459-4ed2-8456-49da98050eaa" xlink:href="glpi-20221231.xsd#glpi_BoomtownBossierCityLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BoomtownBossierCityLAMember_8c744b00-3459-4ed2-8456-49da98050eaa" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LAubergeLakeCharlesLAMember_338772d8-9071-4396-ab30-5d051d475583" xlink:href="glpi-20221231.xsd#glpi_LAubergeLakeCharlesLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_LAubergeLakeCharlesLAMember_338772d8-9071-4396-ab30-5d051d475583" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoomtownNewOrleansLAMember_23fab31a-b92d-4073-aa5b-fd2c8dcf94d9" xlink:href="glpi-20221231.xsd#glpi_BoomtownNewOrleansLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BoomtownNewOrleansLAMember_23fab31a-b92d-4073-aa5b-fd2c8dcf94d9" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarVicksburgMSMember_e374f5eb-8804-491f-a497-19904eb5d0a3" xlink:href="glpi-20221231.xsd#glpi_AmeristarVicksburgMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarVicksburgMSMember_e374f5eb-8804-491f-a497-19904eb5d0a3" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_RiverCityHotelandCasinoMOMember_de6e5ce1-5470-4d8a-9ed6-b4dcde0edea9" xlink:href="glpi-20221231.xsd#glpi_RiverCityHotelandCasinoMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_RiverCityHotelandCasinoMOMember_de6e5ce1-5470-4d8a-9ed6-b4dcde0edea9" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarKansasCityMOMember_2b07a4ee-1f8e-400b-a367-1f5c25c99625" xlink:href="glpi-20221231.xsd#glpi_AmeristarKansasCityMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarKansasCityMOMember_2b07a4ee-1f8e-400b-a367-1f5c25c99625" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmeristarSt.CharlesMOMember_4bc0f5cb-e166-4e68-a3e9-3d135339e2a2" xlink:href="glpi-20221231.xsd#glpi_AmeristarSt.CharlesMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_AmeristarSt.CharlesMOMember_4bc0f5cb-e166-4e68-a3e9-3d135339e2a2" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_JackpotPropertiesNVMember_5be56b0e-f09a-4d08-998c-530c7d0fc0bd" xlink:href="glpi-20221231.xsd#glpi_JackpotPropertiesNVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_JackpotPropertiesNVMember_5be56b0e-f09a-4d08-998c-530c7d0fc0bd" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PlainridgeParkCasinoMAMember_d3a2d4dc-0da5-4045-9fea-4d9735f96b7e" xlink:href="glpi-20221231.xsd#glpi_PlainridgeParkCasinoMAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_PlainridgeParkCasinoMAMember_d3a2d4dc-0da5-4045-9fea-4d9735f96b7e" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheMeadowsRacetrackandCasinoPAMember_5f5b0882-9eb7-4528-9d67-7acae4cb8504" xlink:href="glpi-20221231.xsd#glpi_TheMeadowsRacetrackandCasinoPAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TheMeadowsRacetrackandCasinoPAMember_5f5b0882-9eb7-4528-9d67-7acae4cb8504" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenInEastStLouisIllinoisMember_d1946944-e9a6-4844-96cc-d1a77493257d" xlink:href="glpi-20221231.xsd#glpi_CasinoQueenInEastStLouisIllinoisMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_CasinoQueenInEastStLouisIllinoisMember_d1946944-e9a6-4844-96cc-d1a77493257d" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaAtlanticCityNJMember_81046b4a-9588-4802-b525-2b6f034289b2" xlink:href="glpi-20221231.xsd#glpi_TropicanaAtlanticCityNJMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TropicanaAtlanticCityNJMember_81046b4a-9588-4802-b525-2b6f034289b2" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEvansvilleINMember_0e8f2a69-0273-4e81-bdba-c4a4d81166c3" xlink:href="glpi-20221231.xsd#glpi_TropicanaEvansvilleINMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TropicanaEvansvilleINMember_0e8f2a69-0273-4e81-bdba-c4a4d81166c3" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLaughlinNVMember_25126652-6c6d-4ba4-ac30-d5de0990bb41" xlink:href="glpi-20221231.xsd#glpi_TropicanaLaughlinNVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TropicanaLaughlinNVMember_25126652-6c6d-4ba4-ac30-d5de0990bb41" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropCasinoGreenvilleMSMember_87af84b6-71cb-4b81-91c4-7f4f5470467b" xlink:href="glpi-20221231.xsd#glpi_TropCasinoGreenvilleMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TropCasinoGreenvilleMSMember_87af84b6-71cb-4b81-91c4-7f4f5470467b" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelleofBatonRougeLAMember_e925e55b-7c9a-4f7c-a8fe-cf44388c6359" xlink:href="glpi-20221231.xsd#glpi_BelleofBatonRougeLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BelleofBatonRougeLAMember_e925e55b-7c9a-4f7c-a8fe-cf44388c6359" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_GLPICorporateOfficeMember_ac8caaa7-83c9-49df-89b4-ee858598f651" xlink:href="glpi-20221231.xsd#glpi_GLPICorporateOfficeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_GLPICorporateOfficeMember_ac8caaa7-83c9-49df-89b4-ee858598f651" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OtherownedlandMember_e5b9a07c-5e72-4788-bed0-689454919bb8" xlink:href="glpi-20221231.xsd#glpi_OtherownedlandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_OtherownedlandMember_e5b9a07c-5e72-4788-bed0-689454919bb8" xlink:type="arc" order="42"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraParkGamingAndEntertainmentCenterOHMember_03aad279-4559-4750-837f-c3ad99bb99c1" xlink:href="glpi-20221231.xsd#glpi_BelterraParkGamingAndEntertainmentCenterOHMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BelterraParkGamingAndEntertainmentCenterOHMember_03aad279-4559-4750-837f-c3ad99bb99c1" xlink:type="arc" order="43"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_IsleCasinoWaterlooIAMember_5623005c-7fd1-4955-9446-d630a2643bf1" xlink:href="glpi-20221231.xsd#glpi_IsleCasinoWaterlooIAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_IsleCasinoWaterlooIAMember_5623005c-7fd1-4955-9446-d630a2643bf1" xlink:type="arc" order="44"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_IsleCasinoBettendorfIAMember_443ab1f2-5e49-4837-b970-eb133b71cd00" xlink:href="glpi-20221231.xsd#glpi_IsleCasinoBettendorfIAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_IsleCasinoBettendorfIAMember_443ab1f2-5e49-4837-b970-eb133b71cd00" xlink:type="arc" order="45"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceMOMember_f61d35a0-468c-4c57-82fb-6dbab549774f" xlink:href="glpi-20221231.xsd#glpi_LumierePlaceMOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_LumierePlaceMOMember_f61d35a0-468c-4c57-82fb-6dbab549774f" xlink:type="arc" order="46"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownMember_986fd426-83d2-4c8b-888b-71c1731c16db" xlink:href="glpi-20221231.xsd#glpi_MorgantownMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_MorgantownMember_986fd426-83d2-4c8b-888b-71c1731c16db" xlink:type="arc" order="47"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaEvansvilleMember_f6c355db-3200-4209-a2ab-92d9f470f6bb" xlink:href="glpi-20221231.xsd#glpi_BallysTropicanaEvansvilleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BallysTropicanaEvansvilleMember_f6c355db-3200-4209-a2ab-92d9f470f6bb" xlink:type="arc" order="48"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_b61b6d8c-6794-40fa-a925-6e8722ba2e52" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_b61b6d8c-6794-40fa-a925-6e8722ba2e52" xlink:type="arc" order="49"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PerryvilleLeaseMember_1d3aa002-faec-4cca-b3d3-2c3b41f1605e" xlink:href="glpi-20221231.xsd#glpi_PerryvilleLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_PerryvilleLeaseMember_1d3aa002-faec-4cca-b3d3-2c3b41f1605e" xlink:type="arc" order="50"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DoverDownsHotelCasinoMember_a61253bf-cb0d-49ff-a06a-4b3f1552c663" xlink:href="glpi-20221231.xsd#glpi_DoverDownsHotelCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_DoverDownsHotelCasinoMember_a61253bf-cb0d-49ff-a06a-4b3f1552c663" xlink:type="arc" order="51"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoHotelMarylandMember_4fa83a88-28bc-4fc9-95ee-3040df6819e9" xlink:href="glpi-20221231.xsd#glpi_LiveCasinoHotelMarylandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_LiveCasinoHotelMarylandMember_4fa83a88-28bc-4fc9-95ee-3040df6819e9" xlink:type="arc" order="52"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBatonRougeLAMember_9b411e06-0dd9-417a-96a8-2a2ad0b7421e" xlink:href="glpi-20221231.xsd#glpi_HollywoodCasinoBatonRougeLAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_HollywoodCasinoBatonRougeLAMember_9b411e06-0dd9-417a-96a8-2a2ad0b7421e" xlink:type="arc" order="53"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_da5868a0-a89c-4164-8371-a3573453e026" xlink:href="glpi-20221231.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_TropicanaLasVegasMember_da5868a0-a89c-4164-8371-a3573453e026" xlink:type="arc" order="54"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysBlackHawkMember_57cb4237-7fc5-4417-a064-1096df358347" xlink:href="glpi-20221231.xsd#glpi_BallysBlackHawkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BallysBlackHawkMember_57cb4237-7fc5-4417-a064-1096df358347" xlink:type="arc" order="55"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysQuadCitiesCasinoHotelMember_23c2d389-3ee4-4558-b053-7feb7ed86557" xlink:href="glpi-20221231.xsd#glpi_BallysQuadCitiesCasinoHotelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_64baab56-294f-454b-baca-7e54d158c8ae" xlink:to="loc_glpi_BallysQuadCitiesCasinoHotelMember_23c2d389-3ee4-4558-b053-7feb7ed86557" xlink:type="arc" order="56"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="glpi-20221231.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SubsequentEventsDetails" xlink:type="extended" id="i1f00290040f34bb488362c73efb161a7_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_4fbfb5dc-884e-48da-a26a-a76c28fc4e77" xlink:href="glpi-20221231.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_4fbfb5dc-884e-48da-a26a-a76c28fc4e77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_26e428e2-0945-4d96-b846-c8081094825e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_26e428e2-0945-4d96-b846-c8081094825e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_4b6b2de7-5977-41e2-b668-256f49674adb" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_4b6b2de7-5977-41e2-b668-256f49674adb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_af55b528-f511-474b-b86c-097d34c6c88e" xlink:href="glpi-20221231.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_af55b528-f511-474b-b86c-097d34c6c88e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseCashRentReceived_e1fb3229-0ad4-4e03-982d-33823d2bfd1a" xlink:href="glpi-20221231.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_e1fb3229-0ad4-4e03-982d-33823d2bfd1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_36e23fdf-f8b9-4315-8651-8b1d530e0fe8" xlink:href="glpi-20221231.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_36e23fdf-f8b9-4315-8651-8b1d530e0fe8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_dde886d6-fb18-477c-91f2-6155b893a438" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_dde886d6-fb18-477c-91f2-6155b893a438" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_60ed4ba6-4002-40ce-b846-5d831a0b1ab4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_60ed4ba6-4002-40ce-b846-5d831a0b1ab4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_080904ac-5d67-4697-958e-0805386d2f01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForDepositsOnRealEstateAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_PaymentsForDepositsOnRealEstateAcquisitions_080904ac-5d67-4697-958e-0805386d2f01" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_3af22182-a52d-476d-b850-3b2eb29ae8e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_3af22182-a52d-476d-b850-3b2eb29ae8e5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c6de539c-82b4-418a-a17a-601c24cb2027" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c6de539c-82b4-418a-a17a-601c24cb2027" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_18b4e5cc-701b-4b63-ba31-e992df09217d" xlink:to="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_2193493d-1928-45f1-86a7-2075e9343578" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_LeaseContractualTermAxis_2193493d-1928-45f1-86a7-2075e9343578" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_2193493d-1928-45f1-86a7-2075e9343578_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_2193493d-1928-45f1-86a7-2075e9343578" xlink:to="loc_us-gaap_LeaseContractualTermDomain_2193493d-1928-45f1-86a7-2075e9343578_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_2193493d-1928-45f1-86a7-2075e9343578" xlink:to="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PENNEntertainmentNewMasterLeaseMember_e15f0f14-1da4-4397-b4b6-9d17c9fc5dde" xlink:href="glpi-20221231.xsd#glpi_PENNEntertainmentNewMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:to="loc_glpi_PENNEntertainmentNewMasterLeaseMember_e15f0f14-1da4-4397-b4b6-9d17c9fc5dde" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_97ce121c-acf8-4fd1-b755-7092f507540b" xlink:href="glpi-20221231.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_97ce121c-acf8-4fd1-b755-7092f507540b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseLincolnMember_b5a03c78-ffb4-44c7-b5c5-e3171d696b43" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:to="loc_glpi_BallysMasterLeaseLincolnMember_b5a03c78-ffb4-44c7-b5c5-e3171d696b43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_6a583f41-a9b9-49c0-a660-880373daf670" xlink:href="glpi-20221231.xsd#glpi_BallysMasterLeaseTivertonBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_aa6baf4f-ac71-459c-94c1-56be5d098847" xlink:to="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_6a583f41-a9b9-49c0-a660-880373daf670" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_20b68461-ef40-4d85-ab94-012d97cfc7d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_20b68461-ef40-4d85-ab94-012d97cfc7d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_20b68461-ef40-4d85-ab94-012d97cfc7d5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_20b68461-ef40-4d85-ab94-012d97cfc7d5" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_20b68461-ef40-4d85-ab94-012d97cfc7d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_43893794-1fa4-4b2f-b0e4-11823d043868" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_20b68461-ef40-4d85-ab94-012d97cfc7d5" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_43893794-1fa4-4b2f-b0e4-11823d043868" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_dbd3f1d7-5d73-4e52-bba7-884760564bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_43893794-1fa4-4b2f-b0e4-11823d043868" xlink:to="loc_us-gaap_SubsequentEventMember_dbd3f1d7-5d73-4e52-bba7-884760564bb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3271a9f3-775a-4925-80e5-8a1f4d3fe13b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_27f5f9ee-5b7a-470a-9b18-cb70d6ddd1a6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3271a9f3-775a-4925-80e5-8a1f4d3fe13b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_1aeb43c7-7117-406e-869a-abd74de96392" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3271a9f3-775a-4925-80e5-8a1f4d3fe13b" xlink:to="loc_us-gaap_BuildingMember_1aeb43c7-7117-406e-869a-abd74de96392" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_f85c39c2-109c-43aa-8d80-c32e3ce18a13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3271a9f3-775a-4925-80e5-8a1f4d3fe13b" xlink:to="loc_us-gaap_LandMember_f85c39c2-109c-43aa-8d80-c32e3ce18a13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_9a5f0f89-d465-4e5a-968a-7becf617394f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_9a5f0f89-d465-4e5a-968a-7becf617394f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9a5f0f89-d465-4e5a-968a-7becf617394f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9a5f0f89-d465-4e5a-968a-7becf617394f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9a5f0f89-d465-4e5a-968a-7becf617394f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c4a470a0-51da-45bb-9d0f-dfa42cd19b39" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9a5f0f89-d465-4e5a-968a-7becf617394f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c4a470a0-51da-45bb-9d0f-dfa42cd19b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_e851596b-a57d-4f11-82df-eb049813ec93" xlink:href="glpi-20221231.xsd#glpi_BallysTivertonCasinoHardrockBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c4a470a0-51da-45bb-9d0f-dfa42cd19b39" xlink:to="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_e851596b-a57d-4f11-82df-eb049813ec93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysLincolnMember_f0818f8a-fbd8-406b-b53e-56b01feaf032" xlink:href="glpi-20221231.xsd#glpi_BallysLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c4a470a0-51da-45bb-9d0f-dfa42cd19b39" xlink:to="loc_glpi_BallysLincolnMember_f0818f8a-fbd8-406b-b53e-56b01feaf032" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_11c6ad08-d557-4104-aa6d-1f7e54ca2a95" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_DebtInstrumentAxis_11c6ad08-d557-4104-aa6d-1f7e54ca2a95" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_11c6ad08-d557-4104-aa6d-1f7e54ca2a95_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_11c6ad08-d557-4104-aa6d-1f7e54ca2a95" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_11c6ad08-d557-4104-aa6d-1f7e54ca2a95_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6ec4dcae-3989-48cd-a5ad-f4b70dde71c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_11c6ad08-d557-4104-aa6d-1f7e54ca2a95" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6ec4dcae-3989-48cd-a5ad-f4b70dde71c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_c75aafd2-cdf2-4865-bb29-97e83bf1c9ad" xlink:href="glpi-20221231.xsd#glpi_SeniorUnsecuredNotes5.375PercentDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6ec4dcae-3989-48cd-a5ad-f4b70dde71c5" xlink:to="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_c75aafd2-cdf2-4865-bb29-97e83bf1c9ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_2f1840e9-ef7d-4947-900c-23d47f2408c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_74ac508d-d76f-49ee-8216-785c93f0d75f" xlink:to="loc_us-gaap_CreditFacilityAxis_2f1840e9-ef7d-4947-900c-23d47f2408c9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_2f1840e9-ef7d-4947-900c-23d47f2408c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_2f1840e9-ef7d-4947-900c-23d47f2408c9" xlink:to="loc_us-gaap_CreditFacilityDomain_2f1840e9-ef7d-4947-900c-23d47f2408c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a6a0030a-24e0-433c-8b91-354dd75c5ffd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_2f1840e9-ef7d-4947-900c-23d47f2408c9" xlink:to="loc_us-gaap_CreditFacilityDomain_a6a0030a-24e0-433c-8b91-354dd75c5ffd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DelayedDrawMember_7120b9b4-a354-45d4-8b3d-d075c7727faa" xlink:href="glpi-20221231.xsd#glpi_DelayedDrawMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a6a0030a-24e0-433c-8b91-354dd75c5ffd" xlink:to="loc_glpi_DelayedDrawMember_7120b9b4-a354-45d4-8b3d-d075c7727faa" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
