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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:9e3dd2e8-d3e1-442c-be95-6afb9791b5c8,g:8f872695-778f-450d-a564-33cab13ca193-->
<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/CondensedConsolidatedStatementsofChangesinShareholdersEquityDeficit" xlink:type="simple" xlink:href="glpi-20220930.xsd#CondensedConsolidatedStatementsofChangesinShareholdersEquityDeficit"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/CondensedConsolidatedStatementsofChangesinShareholdersEquityDeficit" xlink:type="extended" id="if9b40285dd4149319c597ca965ab6664_CondensedConsolidatedStatementsofChangesinShareholdersEquityDeficit">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" 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_571b414b-8610-430e-ae30-80cabeebf8e0" 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_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_60600a0a-a198-409f-9dec-39b762c2b99c" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_CommonStockSharesIssued_60600a0a-a198-409f-9dec-39b762c2b99c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_2b2f0938-1c69-4845-b185-a6bacf07f054" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_StockholdersEquity_2b2f0938-1c69-4845-b185-a6bacf07f054" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_45f378e5-9965-4c76-93ae-c105f830653d" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_45f378e5-9965-4c76-93ae-c105f830653d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_396c13ea-022f-4556-9359-6c224e7794a0" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_396c13ea-022f-4556-9359-6c224e7794a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_b9489f4b-a47c-4788-b524-199e52d0b967" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_b9489f4b-a47c-4788-b524-199e52d0b967" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_99f23f07-eb86-4d17-ad78-24dafe39442c" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_99f23f07-eb86-4d17-ad78-24dafe39442c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_dbcb8288-ca49-4a6b-83a6-bba161520c4e" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_Dividends_dbcb8288-ca49-4a6b-83a6-bba161520c4e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_8fff8f84-7ebd-4936-8cbf-8352529a7d7e" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_8fff8f84-7ebd-4936-8cbf-8352529a7d7e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_781c0dcf-9931-48ff-93ce-c157d30939e3" 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_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_781c0dcf-9931-48ff-93ce-c157d30939e3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5f0ce09f-473a-4220-8d40-2cfb96db43d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_571b414b-8610-430e-ae30-80cabeebf8e0" xlink:to="loc_us-gaap_NetIncomeLoss_5f0ce09f-473a-4220-8d40-2cfb96db43d9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_57491110-09f7-42b2-95a2-8a545bb44241" 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_98e3648d-ee0a-4be1-900f-4ef4c13c9aa0" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_96c3e096-5b8c-4e4b-bea5-535d7ad541f0" 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_StatementLineItems_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_96c3e096-5b8c-4e4b-bea5-535d7ad541f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_f9a4bd36-6b7b-425f-a25c-f03e88fb3aa2" 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_StatementLineItems_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" xlink:to="loc_us-gaap_ProfitLoss_f9a4bd36-6b7b-425f-a25c-f03e88fb3aa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7368bf55-5926-4257-b77b-1b935319f2f4" 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_StatementLineItems_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7368bf55-5926-4257-b77b-1b935319f2f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ac345fe5-39de-4d11-96cb-37645d8b16ab" 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_c370b4ac-14f9-4d97-b80c-5b56ace5a79f" xlink:to="loc_us-gaap_StatementTable_ac345fe5-39de-4d11-96cb-37645d8b16ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_78a7b8d2-1bab-441b-b253-cb2191cef72d" 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_ac345fe5-39de-4d11-96cb-37645d8b16ab" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_78a7b8d2-1bab-441b-b253-cb2191cef72d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_78a7b8d2-1bab-441b-b253-cb2191cef72d_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_78a7b8d2-1bab-441b-b253-cb2191cef72d" xlink:to="loc_us-gaap_EquityComponentDomain_78a7b8d2-1bab-441b-b253-cb2191cef72d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_312010fa-3298-485a-9ced-38481e7d7f94" 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_78a7b8d2-1bab-441b-b253-cb2191cef72d" xlink:to="loc_us-gaap_EquityComponentDomain_312010fa-3298-485a-9ced-38481e7d7f94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e17cdc0e-5a55-408c-a9e3-7a00fc95f22f" 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_312010fa-3298-485a-9ced-38481e7d7f94" xlink:to="loc_us-gaap_CommonStockMember_e17cdc0e-5a55-408c-a9e3-7a00fc95f22f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_9bfd590c-ce84-4e9e-a841-8e042fce5a02" 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_312010fa-3298-485a-9ced-38481e7d7f94" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_9bfd590c-ce84-4e9e-a841-8e042fce5a02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_deb023d7-1ecd-485b-9dfe-bdea5adfad44" 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_312010fa-3298-485a-9ced-38481e7d7f94" xlink:to="loc_us-gaap_RetainedEarningsMember_deb023d7-1ecd-485b-9dfe-bdea5adfad44" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_66c1545b-102f-4b57-9491-bc6eb8d7434f" 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_312010fa-3298-485a-9ced-38481e7d7f94" xlink:to="loc_us-gaap_NoncontrollingInterestMember_66c1545b-102f-4b57-9491-bc6eb8d7434f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_31464960-a235-41e6-9be2-75df8ddff082" 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_StatementTable_ac345fe5-39de-4d11-96cb-37645d8b16ab" xlink:to="loc_us-gaap_AwardTypeAxis_31464960-a235-41e6-9be2-75df8ddff082" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_31464960-a235-41e6-9be2-75df8ddff082_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_31464960-a235-41e6-9be2-75df8ddff082" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_31464960-a235-41e6-9be2-75df8ddff082_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_681bfeda-0107-42f0-a0c4-e683b64bbc76" 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_31464960-a235-41e6-9be2-75df8ddff082" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_681bfeda-0107-42f0-a0c4-e683b64bbc76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_51a5d5e8-8cb7-43d4-a84d-8450a4c3d1e1" 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_681bfeda-0107-42f0-a0c4-e683b64bbc76" xlink:to="loc_us-gaap_RestrictedStockMember_51a5d5e8-8cb7-43d4-a84d-8450a4c3d1e1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/BusinessandOperationsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#BusinessandOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/BusinessandOperationsDetails" xlink:type="extended" id="i6ba8f0274c75407cafb6f045662da51f_BusinessandOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:href="glpi-20220930.xsd#glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_a68abb9f-e684-4114-991b-6842ab8eaaab" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_a68abb9f-e684-4114-991b-6842ab8eaaab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_e7b44e75-3002-4a21-96b1-6f340c5513a7" xlink:href="glpi-20220930.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_e7b44e75-3002-4a21-96b1-6f340c5513a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_6a823f72-8e68-4220-8cfa-b6de0fb62764" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_6a823f72-8e68-4220-8cfa-b6de0fb62764" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetConsiderationTransferred_af5dac11-aca7-44b0-8ab7-e03abc4de486" xlink:href="glpi-20220930.xsd#glpi_AssetConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_AssetConsiderationTransferred_af5dac11-aca7-44b0-8ab7-e03abc4de486" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_a2f151a3-16b2-4bd2-aaed-c8fa64486566" xlink:href="glpi-20220930.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_a2f151a3-16b2-4bd2-aaed-c8fa64486566" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireFinanceReceivables_8abd9535-bf5b-498b-b70c-d46ed3ca0f75" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_PaymentsToAcquireFinanceReceivables_8abd9535-bf5b-498b-b70c-d46ed3ca0f75" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_6d3bbcc8-ae9d-4d35-9d9c-f6d00525fb68" xlink:href="glpi-20220930.xsd#glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_6d3bbcc8-ae9d-4d35-9d9c-f6d00525fb68" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRealEstateProperties_d04d48be-bca8-4825-92ce-71ec5fdaf516" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_d04d48be-bca8-4825-92ce-71ec5fdaf516" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_29051f12-bbfc-48a0-9d42-8e689e514287" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_29051f12-bbfc-48a0-9d42-8e689e514287" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Realestateoccupancypercentage_21e144b1-47cc-43e6-b70a-a3a525cfcf14" xlink:href="glpi-20220930.xsd#glpi_Realestateoccupancypercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_Realestateoccupancypercentage_21e144b1-47cc-43e6-b70a-a3a525cfcf14" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_0b682eb0-200d-4ee4-9037-0845292ebc02" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_0b682eb0-200d-4ee4-9037-0845292ebc02" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_d23e6925-04f7-41ab-84af-7cbc8c4c8e04" xlink:href="glpi-20220930.xsd#glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_d23e6925-04f7-41ab-84af-7cbc8c4c8e04" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_c1097d79-a6e6-4550-a964-d4c2e5331bac" xlink:href="glpi-20220930.xsd#glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_c1097d79-a6e6-4550-a964-d4c2e5331bac" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesannualrentalescalationpercentage_7d228c6a-1f3b-4ff1-882f-b3d919bfc626" xlink:href="glpi-20220930.xsd#glpi_Operatingleasesannualrentalescalationpercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_Operatingleasesannualrentalescalationpercentage_7d228c6a-1f3b-4ff1-882f-b3d919bfc626" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_45ac0653-0174-4e23-8a9a-d09bb136f7bd" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_45ac0653-0174-4e23-8a9a-d09bb136f7bd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_1abd2d57-959a-4b8a-bee5-3a3b35a68bf9" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_1abd2d57-959a-4b8a-bee5-3a3b35a68bf9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_6cb336bf-4f0c-46da-8817-ac48d7940b97" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_6cb336bf-4f0c-46da-8817-ac48d7940b97" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_866304ff-a0f8-47fd-82a0-415f6be528c0" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_866304ff-a0f8-47fd-82a0-415f6be528c0" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseCashRentReceived_78d124b1-10df-41ea-b52e-db34463b35e9" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_78d124b1-10df-41ea-b52e-db34463b35e9" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_de7deb9e-59fe-4822-9f30-150c55d8c694" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear5AndYear6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_de7deb9e-59fe-4822-9f30-150c55d8c694" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_db0832c3-7584-4f1c-a952-3293e9f80beb" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear7AndYear8"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_db0832c3-7584-4f1c-a952-3293e9f80beb" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_cc8ff530-df86-4abc-9190-cd2c1adeb151" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorAfterYear9"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_cc8ff530-df86-4abc-9190-cd2c1adeb151" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_c49edb00-7a2f-4f09-8ae7-15cf6776f5d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_c49edb00-7a2f-4f09-8ae7-15cf6776f5d9" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d1f56452-388d-42c5-b955-f29854eeae53" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d1f56452-388d-42c5-b955-f29854eeae53" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AssetAcquisitionRentCreditsTransferred_854c8b26-b4cc-4c2f-8ca8-437aa368e2cc" xlink:href="glpi-20220930.xsd#glpi_AssetAcquisitionRentCreditsTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_AssetAcquisitionRentCreditsTransferred_854c8b26-b4cc-4c2f-8ca8-437aa368e2cc" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_26dd778f-a370-44cd-b17d-293031e2f543" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear2Through5"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_26dd778f-a370-44cd-b17d-293031e2f543" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear6And7_683f0875-c561-4cab-92a6-113d76fbcdf5" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear6And7"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear6And7_683f0875-c561-4cab-92a6-113d76fbcdf5" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_6460de4a-ece8-42d0-8e17-0372d179441b" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear8AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_6460de4a-ece8-42d0-8e17-0372d179441b" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyHeldForSale_6cf23561-7ea3-481e-8f12-8402ca717627" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyHeldForSale_6cf23561-7ea3-481e-8f12-8402ca717627" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_058f94d0-4d68-445d-8918-820e66cdac27" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear1Through6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_058f94d0-4d68-445d-8918-820e66cdac27" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_f1618338-a6df-43fa-aa35-dac319344c24" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_f1618338-a6df-43fa-aa35-dac319344c24" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_7ee1708a-59e3-4960-bcf4-e46de68c5f5b" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_7ee1708a-59e3-4960-bcf4-e46de68c5f5b" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_1b7327a3-ce06-44b7-adb4-5fb06af57829" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_1b7327a3-ce06-44b7-adb4-5fb06af57829" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SalesLeasebackTransactionYield_2400184c-927a-4b30-947b-928d64228e5e" xlink:href="glpi-20220930.xsd#glpi_SalesLeasebackTransactionYield"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_SalesLeasebackTransactionYield_2400184c-927a-4b30-947b-928d64228e5e" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SalesLeasebackRightOfRefusalAmount_b2971bad-78ff-4a6f-b088-8db3a4bd3d12" xlink:href="glpi-20220930.xsd#glpi_SalesLeasebackRightOfRefusalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_SalesLeasebackRightOfRefusalAmount_b2971bad-78ff-4a6f-b088-8db3a4bd3d12" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_5513ca6b-55ea-4150-b83e-2cdeede4a70f" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_5513ca6b-55ea-4150-b83e-2cdeede4a70f" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_7a055f65-1d4f-4c0d-a97a-70424c93e9ec" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_7a055f65-1d4f-4c0d-a97a-70424c93e9ec" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_4d0ad62a-5a13-4d6c-a22b-b6f174ed602e" 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_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_4d0ad62a-5a13-4d6c-a22b-b6f174ed602e" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:href="glpi-20220930.xsd#glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_9d06125a-30ca-4be0-bf9f-789d790203c0" xlink:to="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_7c0fe90a-7912-49fc-9566-3edc77ac453d" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_srt_CounterpartyNameAxis_7c0fe90a-7912-49fc-9566-3edc77ac453d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7c0fe90a-7912-49fc-9566-3edc77ac453d_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_7c0fe90a-7912-49fc-9566-3edc77ac453d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7c0fe90a-7912-49fc-9566-3edc77ac453d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9669e256-5c61-40c5-9f32-61990105d0f0" 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_7c0fe90a-7912-49fc-9566-3edc77ac453d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9669e256-5c61-40c5-9f32-61990105d0f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoResortsInc.Member_abf786f0-0df1-41d9-ad5f-5c6ad2a14c6d" xlink:href="glpi-20220930.xsd#glpi_EldoradoResortsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9669e256-5c61-40c5-9f32-61990105d0f0" xlink:to="loc_glpi_EldoradoResortsInc.Member_abf786f0-0df1-41d9-ad5f-5c6ad2a14c6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMember_dcd2b125-81e9-4684-94f9-3484c63a714a" xlink:href="glpi-20220930.xsd#glpi_BoydGamingCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9669e256-5c61-40c5-9f32-61990105d0f0" xlink:to="loc_glpi_BoydGamingCorporationMember_dcd2b125-81e9-4684-94f9-3484c63a714a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_1306ad23-b536-40ef-b108-85a608eef6c3" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_srt_MajorCustomersAxis_1306ad23-b536-40ef-b108-85a608eef6c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_1306ad23-b536-40ef-b108-85a608eef6c3_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_1306ad23-b536-40ef-b108-85a608eef6c3" xlink:to="loc_srt_NameOfMajorCustomerDomain_1306ad23-b536-40ef-b108-85a608eef6c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" 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_1306ad23-b536-40ef-b108-85a608eef6c3" xlink:to="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoResortsInc.Member_1574bf77-b3dd-403b-a6a4-911991e63995" xlink:href="glpi-20220930.xsd#glpi_EldoradoResortsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_EldoradoResortsInc.Member_1574bf77-b3dd-403b-a6a4-911991e63995" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMember_85c54b1d-6bcd-43e4-86c5-cc4178d4da2a" xlink:href="glpi-20220930.xsd#glpi_BoydGamingCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_BoydGamingCorporationMember_85c54b1d-6bcd-43e4-86c5-cc4178d4da2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingIncMember_62d2e664-fa9a-4f8c-b352-177305701fe7" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_PennNationalGamingIncMember_62d2e664-fa9a-4f8c-b352-177305701fe7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_56ee9b91-9412-4308-a745-c0a0fd154174" xlink:href="glpi-20220930.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_TheCordishCompaniesMember_56ee9b91-9412-4308-a745-c0a0fd154174" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceLeaseMember_50e55e1d-b41a-4fbf-a436-d87f82f867d4" xlink:href="glpi-20220930.xsd#glpi_LumierePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_LumierePlaceLeaseMember_50e55e1d-b41a-4fbf-a436-d87f82f867d4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_7fe90bae-6665-4c5d-822d-af2ada1d3dd6" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_BallysMasterLeaseMember_7fe90bae-6665-4c5d-822d-af2ada1d3dd6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CQHoldingCompanyMember_d2deb863-155e-4df6-b5cd-43dc340350aa" xlink:href="glpi-20220930.xsd#glpi_CQHoldingCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_005c924c-a6da-45aa-996d-d6f95d98361c" xlink:to="loc_glpi_CQHoldingCompanyMember_d2deb863-155e-4df6-b5cd-43dc340350aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6440787f-8327-412e-a528-ae685b27668e" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6440787f-8327-412e-a528-ae685b27668e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_6440787f-8327-412e-a528-ae685b27668e_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_6440787f-8327-412e-a528-ae685b27668e" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_6440787f-8327-412e-a528-ae685b27668e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4311b29e-a19f-4fa2-9f1a-fae22fe9f207" 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_6440787f-8327-412e-a528-ae685b27668e" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4311b29e-a19f-4fa2-9f1a-fae22fe9f207" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateLoanMember_5674b3d3-76c5-4493-8630-cfbe2730981d" 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_4311b29e-a19f-4fa2-9f1a-fae22fe9f207" xlink:to="loc_us-gaap_RealEstateLoanMember_5674b3d3-76c5-4493-8630-cfbe2730981d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_fb936964-1b3f-4eb4-a18f-78e3143e1bde" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_fb936964-1b3f-4eb4-a18f-78e3143e1bde" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb936964-1b3f-4eb4-a18f-78e3143e1bde_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_fb936964-1b3f-4eb4-a18f-78e3143e1bde" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb936964-1b3f-4eb4-a18f-78e3143e1bde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" 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_fb936964-1b3f-4eb4-a18f-78e3143e1bde" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PinnacleEntertainmentInc.Member_6c32fce3-9065-42ef-b845-cd276087ee3b" xlink:href="glpi-20220930.xsd#glpi_PinnacleEntertainmentInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_PinnacleEntertainmentInc.Member_6c32fce3-9065-42ef-b845-cd276087ee3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PlainridgeParkCasinoMember_7aee02a1-b356-4a91-92a8-a221f7880eef" xlink:href="glpi-20220930.xsd#glpi_PlainridgeParkCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_PlainridgeParkCasinoMember_7aee02a1-b356-4a91-92a8-a221f7880eef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEntertainmentMember_3c4a94e1-ceb9-45aa-99b0-8d6e3ed0bdc4" xlink:href="glpi-20220930.xsd#glpi_TropicanaEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_TropicanaEntertainmentMember_3c4a94e1-ceb9-45aa-99b0-8d6e3ed0bdc4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaEvansvilleMember_5aa39eee-895a-434b-955c-6a600d6377a5" xlink:href="glpi-20220930.xsd#glpi_BallysTropicanaEvansvilleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_BallysTropicanaEvansvilleMember_5aa39eee-895a-434b-955c-6a600d6377a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DoverDownsHotelCasinoMember_82255bc6-fcaa-43e7-bff3-382018111e25" xlink:href="glpi-20220930.xsd#glpi_DoverDownsHotelCasinoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_DoverDownsHotelCasinoMember_82255bc6-fcaa-43e7-bff3-382018111e25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_5857c716-3c68-42a3-b575-b81dd7c2acc3" xlink:href="glpi-20220930.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_5857c716-3c68-42a3-b575-b81dd7c2acc3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_038b4003-fdaa-42db-9de4-62f40aeaa354" xlink:href="glpi-20220930.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_TheCordishCompaniesMember_038b4003-fdaa-42db-9de4-62f40aeaa354" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_5f49a522-cecb-4224-af69-8448bf92bd6d" xlink:href="glpi-20220930.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_5f49a522-cecb-4224-af69-8448bf92bd6d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysLincolnMember_5abcaee8-fa5f-49aa-b695-067ca119327e" xlink:href="glpi-20220930.xsd#glpi_BallysLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_BallysLincolnMember_5abcaee8-fa5f-49aa-b695-067ca119327e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaLasVegasMember_3bbc8f7b-822b-4b29-9e64-66720b22ebaf" xlink:href="glpi-20220930.xsd#glpi_BallysTropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_850927b4-9d4a-4cee-80c6-745298076665" xlink:to="loc_glpi_BallysTropicanaLasVegasMember_3bbc8f7b-822b-4b29-9e64-66720b22ebaf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_87a32405-7319-49a0-b938-0b38315be029" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_us-gaap_LeaseContractualTermAxis_87a32405-7319-49a0-b938-0b38315be029" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_87a32405-7319-49a0-b938-0b38315be029_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_87a32405-7319-49a0-b938-0b38315be029" xlink:to="loc_us-gaap_LeaseContractualTermDomain_87a32405-7319-49a0-b938-0b38315be029_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" 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_87a32405-7319-49a0-b938-0b38315be029" xlink:to="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_bf27adb5-39d9-4ad7-990f-f62aafe3bd89" xlink:href="glpi-20220930.xsd#glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_bf27adb5-39d9-4ad7-990f-f62aafe3bd89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMasterLeaseMember_b12e5875-7c45-4756-930e-d3a511dbbee1" xlink:href="glpi-20220930.xsd#glpi_BoydGamingCorporationMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_BoydGamingCorporationMasterLeaseMember_b12e5875-7c45-4756-930e-d3a511dbbee1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_73fa2b07-e6ca-4e87-b0a1-17711b5e5680" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingInc.MeadowsLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_73fa2b07-e6ca-4e87-b0a1-17711b5e5680" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CaesarsMasterLeaseMember_dae672ce-042a-4ec2-808a-b840a9ff3b81" xlink:href="glpi-20220930.xsd#glpi_CaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_CaesarsMasterLeaseMember_dae672ce-042a-4ec2-808a-b840a9ff3b81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_9fb1fa80-557d-4c11-9351-f5d85c64d8df" xlink:href="glpi-20220930.xsd#glpi_AmendedAndRestatedCaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_9fb1fa80-557d-4c11-9351-f5d85c64d8df" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumirePlaceLeaseMember_ab11ce0a-1f15-41a7-a860-e7febf54637e" xlink:href="glpi-20220930.xsd#glpi_LumirePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_LumirePlaceLeaseMember_ab11ce0a-1f15-41a7-a860-e7febf54637e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownLeaseMember_ac0103e8-2590-4825-8a6e-fc8fcf30add2" xlink:href="glpi-20220930.xsd#glpi_MorgantownLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_MorgantownLeaseMember_ac0103e8-2590-4825-8a6e-fc8fcf30add2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_aef4158b-ac5f-4505-a088-c3796156a8e0" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_BallysMasterLeaseMember_aef4158b-ac5f-4505-a088-c3796156a8e0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoPerryvilleMDMember_c2ab86fe-1c0b-41b8-ba23-f4b483d58ba2" xlink:href="glpi-20220930.xsd#glpi_HollywoodCasinoPerryvilleMDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_HollywoodCasinoPerryvilleMDMember_c2ab86fe-1c0b-41b8-ba23-f4b483d58ba2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandAndPALeasesMember_794b95f9-af97-4eac-b87a-50a6ccacdec7" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoMarylandAndPALeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_LiveCasinoMarylandAndPALeasesMember_794b95f9-af97-4eac-b87a-50a6ccacdec7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_a6b32c56-8106-4d8b-b78d-63994ee7c8db" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_a6b32c56-8106-4d8b-b78d-63994ee7c8db" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMasterLeaseMember_f01261d1-0471-44f0-8af4-e940b93f7c4a" xlink:href="glpi-20220930.xsd#glpi_CasinoQueenMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_CasinoQueenMasterLeaseMember_f01261d1-0471-44f0-8af4-e940b93f7c4a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceLeaseMember_eda262e7-ea2f-4087-9fcb-49fd9b1cb607" xlink:href="glpi-20220930.xsd#glpi_LumierePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_LumierePlaceLeaseMember_eda262e7-ea2f-4087-9fcb-49fd9b1cb607" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_697bef34-feba-4ca3-8f1c-8145b0df91dd" xlink:href="glpi-20220930.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_PALiveMasterLeaseMember_697bef34-feba-4ca3-8f1c-8145b0df91dd" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraParkLeaseMember_cf9d4d12-4402-44b1-8fb6-f8746deea646" xlink:href="glpi-20220930.xsd#glpi_BelterraParkLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_BelterraParkLeaseMember_cf9d4d12-4402-44b1-8fb6-f8746deea646" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_88f1be38-d5d3-4283-9904-1605efe06426" xlink:href="glpi-20220930.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_88f1be38-d5d3-4283-9904-1605efe06426" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonLincolnMember_7a7b4c5f-7741-44b7-8f6e-bd64535141c9" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseTivertonLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_BallysMasterLeaseTivertonLincolnMember_7a7b4c5f-7741-44b7-8f6e-bd64535141c9" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_7ae60021-9f5d-4961-8196-e2732f1f3192" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_7ae60021-9f5d-4961-8196-e2732f1f3192" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_58170ed9-4257-4887-92ac-253633ff6d6c" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseTivertonBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_58170ed9-4257-4887-92ac-253633ff6d6c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasLeaseMember_4a5f9829-2e55-47d0-b7a4-958a6b28a35a" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_TropicanaLasVegasLeaseMember_4a5f9829-2e55-47d0-b7a4-958a6b28a35a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_8a7f5959-1e6c-490a-bc60-e6f6ead966e2" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_59b040bd-7483-4f7b-a686-534bc930b4c0" xlink:to="loc_glpi_TropicanaLasVegasMember_8a7f5959-1e6c-490a-bc60-e6f6ead966e2" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bb13c7a4-18a8-4d78-9a95-743a3a90b59f" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bb13c7a4-18a8-4d78-9a95-743a3a90b59f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_bb13c7a4-18a8-4d78-9a95-743a3a90b59f_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_bb13c7a4-18a8-4d78-9a95-743a3a90b59f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_bb13c7a4-18a8-4d78-9a95-743a3a90b59f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c0e70bd8-98ef-4136-99ff-98b307b988fb" 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_bb13c7a4-18a8-4d78-9a95-743a3a90b59f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c0e70bd8-98ef-4136-99ff-98b307b988fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_f4e5cb0a-9b67-4cc5-9fc5-7c7d390ec99f" 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_c0e70bd8-98ef-4136-99ff-98b307b988fb" xlink:to="loc_us-gaap_LandMember_f4e5cb0a-9b67-4cc5-9fc5-7c7d390ec99f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_51554fbe-3ad6-4261-adf6-29267225a121" 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_c0e70bd8-98ef-4136-99ff-98b307b988fb" xlink:to="loc_us-gaap_BuildingMember_51554fbe-3ad6-4261-adf6-29267225a121" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_1c54aacd-5467-474e-80fa-f9296f287fba" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_glpi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_glpi_TriggeringEventAxis_1c54aacd-5467-474e-80fa-f9296f287fba" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_1c54aacd-5467-474e-80fa-f9296f287fba_default" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_1c54aacd-5467-474e-80fa-f9296f287fba" xlink:to="loc_glpi_TriggeringEventDomain_1c54aacd-5467-474e-80fa-f9296f287fba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_8d448d8e-5710-4ca5-b8bc-6fd406656506" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_1c54aacd-5467-474e-80fa-f9296f287fba" xlink:to="loc_glpi_TriggeringEventDomain_8d448d8e-5710-4ca5-b8bc-6fd406656506" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoBatonRougeMember_ff7fe37e-b02a-49ec-b289-b80b5d2a7a00" xlink:href="glpi-20220930.xsd#glpi_HollywoodCasinoBatonRougeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_8d448d8e-5710-4ca5-b8bc-6fd406656506" xlink:to="loc_glpi_HollywoodCasinoBatonRougeMember_ff7fe37e-b02a-49ec-b289-b80b5d2a7a00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_90477c89-6f9d-46fd-a85f-f606d73b4c81" 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_423e82e2-0146-4e68-8ca2-25ff696e0776" xlink:to="loc_srt_RangeAxis_90477c89-6f9d-46fd-a85f-f606d73b4c81" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_90477c89-6f9d-46fd-a85f-f606d73b4c81_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_90477c89-6f9d-46fd-a85f-f606d73b4c81" xlink:to="loc_srt_RangeMember_90477c89-6f9d-46fd-a85f-f606d73b4c81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3acaeb17-9eb8-4673-95f0-b47da56e6c89" 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_90477c89-6f9d-46fd-a85f-f606d73b4c81" xlink:to="loc_srt_RangeMember_3acaeb17-9eb8-4673-95f0-b47da56e6c89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e41cc825-fdeb-4c7b-bac0-eb35dda8b3e3" 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_3acaeb17-9eb8-4673-95f0-b47da56e6c89" xlink:to="loc_srt_MaximumMember_e41cc825-fdeb-4c7b-bac0-eb35dda8b3e3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetDirectFinancingLeasesDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#InvestmentinleasesfinancingreceivablesnetDirectFinancingLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/InvestmentinleasesfinancingreceivablesnetDirectFinancingLeasesDetails" xlink:type="extended" id="ica19a75d1e7e4fcba305ee969ebfe042_InvestmentinleasesfinancingreceivablesnetDirectFinancingLeasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_c93d6d4d-0d5c-4036-830b-1334b19b7f95" 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_2a85be89-e346-406b-b306-649f9deb15f3" 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_c93d6d4d-0d5c-4036-830b-1334b19b7f95" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_2a85be89-e346-406b-b306-649f9deb15f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_31a440f5-3138-47bd-a656-7eb39233c0de" 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_2a85be89-e346-406b-b306-649f9deb15f3" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_31a440f5-3138-47bd-a656-7eb39233c0de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_9596fa2f-d9e8-4a99-8831-56295a0439a6" 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_FinancingReceivableAllowanceForCreditLossesRollForward_2a85be89-e346-406b-b306-649f9deb15f3" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_9596fa2f-d9e8-4a99-8831-56295a0439a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_d14065ad-3f95-4499-b568-932537604348" 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_us-gaap_LesseeLeaseDescriptionTable_79930fcd-1420-465e-ae47-a93c0f3269c4" 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_c93d6d4d-0d5c-4036-830b-1334b19b7f95" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_79930fcd-1420-465e-ae47-a93c0f3269c4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_b67ea62d-c941-4c93-80b8-f70d0729661c" 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_79930fcd-1420-465e-ae47-a93c0f3269c4" xlink:to="loc_us-gaap_LeaseContractualTermAxis_b67ea62d-c941-4c93-80b8-f70d0729661c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_b67ea62d-c941-4c93-80b8-f70d0729661c_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_b67ea62d-c941-4c93-80b8-f70d0729661c" xlink:to="loc_us-gaap_LeaseContractualTermDomain_b67ea62d-c941-4c93-80b8-f70d0729661c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_47863e20-c12b-479f-a7c8-d4514069c01f" 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_b67ea62d-c941-4c93-80b8-f70d0729661c" xlink:to="loc_us-gaap_LeaseContractualTermDomain_47863e20-c12b-479f-a7c8-d4514069c01f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_771e33a2-c522-4545-b7d5-1b2f1b27f223" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_47863e20-c12b-479f-a7c8-d4514069c01f" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_771e33a2-c522-4545-b7d5-1b2f1b27f223" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoPAMasterLeaseMember_66e8c017-157a-4d0c-8815-1f6dc5b88253" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoPAMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_47863e20-c12b-479f-a7c8-d4514069c01f" xlink:to="loc_glpi_LiveCasinoPAMasterLeaseMember_66e8c017-157a-4d0c-8815-1f6dc5b88253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_e961d8de-6adb-4be1-a1cf-35e162522b95" xlink:href="glpi-20220930.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_47863e20-c12b-479f-a7c8-d4514069c01f" xlink:to="loc_glpi_PALiveMasterLeaseMember_e961d8de-6adb-4be1-a1cf-35e162522b95" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RealEstateInvestmentsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#RealEstateInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RealEstateInvestmentsDetails" xlink:type="extended" id="i23cc6d088341458a8b0ba74c382a699b_RealEstateInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstatePropertiesLineItems_4f238b94-acbc-4419-ae06-580b7532427a" 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_e1ae4a9c-819d-4511-acaf-3a21005dd4b8" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_e1ae4a9c-819d-4511-acaf-3a21005dd4b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_ae49abd0-c045-46c3-a190-215cb23db9d3" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAtCost_ae49abd0-c045-46c3-a190-215cb23db9d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_147b4914-6a32-42d7-b043-a19b4948206d" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_147b4914-6a32-42d7-b043-a19b4948206d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_834f43a2-065f-4bc0-96ff-b5065d254de2" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_834f43a2-065f-4bc0-96ff-b5065d254de2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressGross_d2ddfe97-2af6-46a7-a4a3-42bff3034c5f" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_ConstructionInProgressGross_d2ddfe97-2af6-46a7-a4a3-42bff3034c5f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_6c6e0c62-079a-4996-8fcd-a299be8b645c" 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_4f238b94-acbc-4419-ae06-580b7532427a" xlink:to="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_6c6e0c62-079a-4996-8fcd-a299be8b645c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2ffead4a-377c-48bd-ad4b-496aca348ed3" 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_6c6e0c62-079a-4996-8fcd-a299be8b645c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2ffead4a-377c-48bd-ad4b-496aca348ed3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2ffead4a-377c-48bd-ad4b-496aca348ed3_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_2ffead4a-377c-48bd-ad4b-496aca348ed3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2ffead4a-377c-48bd-ad4b-496aca348ed3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_13e7f9e8-dda1-4546-8be9-7439939ac2c4" 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_2ffead4a-377c-48bd-ad4b-496aca348ed3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_13e7f9e8-dda1-4546-8be9-7439939ac2c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_0307eb73-0515-4309-b61d-3c25d247309b" 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_13e7f9e8-dda1-4546-8be9-7439939ac2c4" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_0307eb73-0515-4309-b61d-3c25d247309b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_d5f8444a-a987-4f9a-81e2-d5eb984448c8" 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_13e7f9e8-dda1-4546-8be9-7439939ac2c4" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_d5f8444a-a987-4f9a-81e2-d5eb984448c8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AssetsHeldforSaleNarrativeDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#AssetsHeldforSaleNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AssetsHeldforSaleNarrativeDetails" xlink:type="extended" id="i62997a804ecf421baaa3e495fe4ec516_AssetsHeldforSaleNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" 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_BusinessCombinationConsiderationTransferred1_aeecabf4-0401-4dc3-89ac-ddd2770b68c7" 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_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_aeecabf4-0401-4dc3-89ac-ddd2770b68c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_bbb6225f-a65b-45d1-aab6-2994ed8b57d7" 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_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_bbb6225f-a65b-45d1-aab6-2994ed8b57d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_906e4da5-5192-4eb9-8530-1b36f98ffdc9" 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_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_906e4da5-5192-4eb9-8530-1b36f98ffdc9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfRealEstate_1fd225ec-52cc-4aa3-af6f-cda5cf793d87" 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_LongLivedAssetsHeldForSaleLineItems_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_ImpairmentOfRealEstate_1fd225ec-52cc-4aa3-af6f-cda5cf793d87" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_70325c1f-a30a-46ee-a84a-a4f5ca9e79d0" 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_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_70325c1f-a30a-46ee-a84a-a4f5ca9e79d0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_42be54e0-e534-4688-b16a-04b03019b103" 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_a7d07f6e-0d88-4512-88cd-4c06fdcd6407" xlink:to="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_42be54e0-e534-4688-b16a-04b03019b103" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ba2c020f-380e-4f46-9e3f-d8f56374ab4f" 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_42be54e0-e534-4688-b16a-04b03019b103" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ba2c020f-380e-4f46-9e3f-d8f56374ab4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba2c020f-380e-4f46-9e3f-d8f56374ab4f_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_ba2c020f-380e-4f46-9e3f-d8f56374ab4f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ba2c020f-380e-4f46-9e3f-d8f56374ab4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3c2e05bc-d6d4-4611-a6d3-87b7893259d5" 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_ba2c020f-380e-4f46-9e3f-d8f56374ab4f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3c2e05bc-d6d4-4611-a6d3-87b7893259d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_a89560e9-db7a-4646-9907-1ec3c2626f02" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3c2e05bc-d6d4-4611-a6d3-87b7893259d5" xlink:to="loc_glpi_TropicanaLasVegasMember_a89560e9-db7a-4646-9907-1ec3c2626f02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTropicanaLasVegasMember_6d3c597e-5ecc-4cc1-bb94-d1c246d3855a" xlink:href="glpi-20220930.xsd#glpi_BallysTropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3c2e05bc-d6d4-4611-a6d3-87b7893259d5" xlink:to="loc_glpi_BallysTropicanaLasVegasMember_6d3c597e-5ecc-4cc1-bb94-d1c246d3855a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_bdb17edd-091b-4e2e-8828-bc277649b0b4" 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_42be54e0-e534-4688-b16a-04b03019b103" xlink:to="loc_us-gaap_LeaseContractualTermAxis_bdb17edd-091b-4e2e-8828-bc277649b0b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_bdb17edd-091b-4e2e-8828-bc277649b0b4_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_bdb17edd-091b-4e2e-8828-bc277649b0b4" xlink:to="loc_us-gaap_LeaseContractualTermDomain_bdb17edd-091b-4e2e-8828-bc277649b0b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_bf42dbc9-f4d7-4c31-bd24-0843ccea0e83" 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_bdb17edd-091b-4e2e-8828-bc277649b0b4" xlink:to="loc_us-gaap_LeaseContractualTermDomain_bf42dbc9-f4d7-4c31-bd24-0843ccea0e83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_39f5ca7e-8b86-4edf-b840-a9b249372b7e" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_bf42dbc9-f4d7-4c31-bd24-0843ccea0e83" xlink:to="loc_glpi_TropicanaLasVegasMember_39f5ca7e-8b86-4edf-b840-a9b249372b7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SEInletPropertiesMember_547d9bd4-5259-4d61-919a-a8d2e4204202" xlink:href="glpi-20220930.xsd#glpi_SEInletPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_bf42dbc9-f4d7-4c31-bd24-0843ccea0e83" xlink:to="loc_glpi_SEInletPropertiesMember_547d9bd4-5259-4d61-919a-a8d2e4204202" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_ed4bbe2b-2f6c-473b-b18c-79b0950f061d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_42be54e0-e534-4688-b16a-04b03019b103" xlink:to="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_ed4bbe2b-2f6c-473b-b18c-79b0950f061d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_ed4bbe2b-2f6c-473b-b18c-79b0950f061d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_ed4bbe2b-2f6c-473b-b18c-79b0950f061d" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_ed4bbe2b-2f6c-473b-b18c-79b0950f061d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_776dd795-ca18-4030-80ed-64f2d41e04a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_ed4bbe2b-2f6c-473b-b18c-79b0950f061d" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_776dd795-ca18-4030-80ed-64f2d41e04a3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails" xlink:type="extended" id="ia620bd3922974aff8457d675f1666efa_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesLeaseAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_88527bf5-3ff3-4614-89a1-7b200772f07f" 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_59b6424e-3c85-4d4e-92c6-5245a8ea2deb" 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_88527bf5-3ff3-4614-89a1-7b200772f07f" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_59b6424e-3c85-4d4e-92c6-5245a8ea2deb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_41377759-239e-488c-a22b-43f88276fbbd" 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_88527bf5-3ff3-4614-89a1-7b200772f07f" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_41377759-239e-488c-a22b-43f88276fbbd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_55169b15-dbf7-41ea-9ea9-dc29ccac81af" 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_41377759-239e-488c-a22b-43f88276fbbd" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_55169b15-dbf7-41ea-9ea9-dc29ccac81af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_55169b15-dbf7-41ea-9ea9-dc29ccac81af_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_55169b15-dbf7-41ea-9ea9-dc29ccac81af" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_55169b15-dbf7-41ea-9ea9-dc29ccac81af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a76a0fa1-9933-4dfb-b784-3fb2387461cf" 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_55169b15-dbf7-41ea-9ea9-dc29ccac81af" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a76a0fa1-9933-4dfb-b784-3fb2387461cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember_9a7fb447-ce3d-4e15-a900-05b6461057a2" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a76a0fa1-9933-4dfb-b784-3fb2387461cf" xlink:to="loc_glpi_OperatingLeaseRightofUseAssetsExcludingLandRightsMember_9a7fb447-ce3d-4e15-a900-05b6461057a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_caab8e0e-c7f3-46e4-a82a-73bdff50d7ef" xlink:href="glpi-20220930.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_a76a0fa1-9933-4dfb-b784-3fb2387461cf" xlink:to="loc_glpi_LandRightsMember_caab8e0e-c7f3-46e4-a82a-73bdff50d7ef" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLIabilitiesLandRightsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLIabilitiesLandRightsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLIabilitiesLandRightsDetails" xlink:type="extended" id="i66358554ecc740c2a22d7634602d88bc_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLIabilitiesLandRightsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5b0ee444-5816-487c-b4bc-8721660e12f9" 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_60398471-d5cf-4eea-9112-6fcdd2c30d07" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_60398471-d5cf-4eea-9112-6fcdd2c30d07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_d2d9fc05-66ef-4d52-997f-0d4c24852684" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_d2d9fc05-66ef-4d52-997f-0d4c24852684" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_663175e4-0e37-4246-8667-1010764d7da5" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_663175e4-0e37-4246-8667-1010764d7da5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e1b78b6d-c0b9-4b61-931a-134e4d7ebaae" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e1b78b6d-c0b9-4b61-931a-134e4d7ebaae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_0f460257-c9cd-4332-80f4-d2cd6cce6274" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_c7f674cc-a19f-4590-a0da-40dd53159f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_c7f674cc-a19f-4590-a0da-40dd53159f4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_f17e364a-692c-4538-ac83-480e7271bff0" 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_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_f17e364a-692c-4538-ac83-480e7271bff0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6a48621f-1529-42aa-989f-8b080f8e803b" 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_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6a48621f-1529-42aa-989f-8b080f8e803b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_62e15267-6a51-4281-99a1-6c83d731068e" 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_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_62e15267-6a51-4281-99a1-6c83d731068e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_de6ccccf-da4d-497d-98e5-1cb3d632d035" 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_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_de6ccccf-da4d-497d-98e5-1cb3d632d035" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_8a591794-a603-43ac-bc71-6437a5aaefea" xlink:href="glpi-20220930.xsd#glpi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_0f460257-c9cd-4332-80f4-d2cd6cce6274" xlink:to="loc_glpi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_8a591794-a603-43ac-bc71-6437a5aaefea" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e9a1e810-26fb-4ae7-953a-6896dc1253dd" 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_5b0ee444-5816-487c-b4bc-8721660e12f9" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e9a1e810-26fb-4ae7-953a-6896dc1253dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_0fdb7d43-92d3-4bb1-afb2-02e74df3e645" 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_e9a1e810-26fb-4ae7-953a-6896dc1253dd" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_0fdb7d43-92d3-4bb1-afb2-02e74df3e645" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_0fdb7d43-92d3-4bb1-afb2-02e74df3e645_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_0fdb7d43-92d3-4bb1-afb2-02e74df3e645" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_0fdb7d43-92d3-4bb1-afb2-02e74df3e645_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_3830c000-40cd-41dc-9d6f-bcf6f9079402" 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_0fdb7d43-92d3-4bb1-afb2-02e74df3e645" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_3830c000-40cd-41dc-9d6f-bcf6f9079402" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_6b7be4ef-fbea-4846-9b7f-0a07e707af61" xlink:href="glpi-20220930.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_3830c000-40cd-41dc-9d6f-bcf6f9079402" xlink:to="loc_glpi_LandRightsMember_6b7be4ef-fbea-4846-9b7f-0a07e707af61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e" 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_e9a1e810-26fb-4ae7-953a-6896dc1253dd" xlink:to="loc_srt_RangeAxis_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e_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_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e" xlink:to="loc_srt_RangeMember_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_da2bdc45-6c4e-4eef-956d-0f78624f0a28" 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_d94b00ce-ca9a-46fa-8c5f-9c5f19569c6e" xlink:to="loc_srt_RangeMember_da2bdc45-6c4e-4eef-956d-0f78624f0a28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_0e9c7d27-54e9-487d-b150-d2e631219fba" 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_da2bdc45-6c4e-4eef-956d-0f78624f0a28" xlink:to="loc_srt_MinimumMember_0e9c7d27-54e9-487d-b150-d2e631219fba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_676193d9-e60f-4ffd-b351-35d830724c04" 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_da2bdc45-6c4e-4eef-956d-0f78624f0a28" xlink:to="loc_srt_MaximumMember_676193d9-e60f-4ffd-b351-35d830724c04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_258bf917-9703-4983-85b1-3336cb09e089" 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_e9a1e810-26fb-4ae7-953a-6896dc1253dd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_258bf917-9703-4983-85b1-3336cb09e089" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_258bf917-9703-4983-85b1-3336cb09e089_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_258bf917-9703-4983-85b1-3336cb09e089" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_258bf917-9703-4983-85b1-3336cb09e089_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fe302f33-aa39-4ef1-8943-42ec766d620d" 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_258bf917-9703-4983-85b1-3336cb09e089" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fe302f33-aa39-4ef1-8943-42ec766d620d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffMarketFavorableLeaseMember_a3d0dd65-af35-436e-ab76-2a42158db5ad" 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_fe302f33-aa39-4ef1-8943-42ec766d620d" xlink:to="loc_us-gaap_OffMarketFavorableLeaseMember_a3d0dd65-af35-436e-ab76-2a42158db5ad" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails" xlink:type="extended" id="i1532ac3e6e754c5e8b3917882241ca68_LeaseAssetsandLeaseLiabilitiesLeaseAssetsandLeaseLiabilitiesComponentsofLeaseExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" 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_OperatingLeaseCost_2866c76b-eee4-48ac-9b45-fc15a2981bf9" 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_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_OperatingLeaseCost_2866c76b-eee4-48ac-9b45-fc15a2981bf9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_b97a0a1b-4495-41ce-9014-ed3bba7d78bd" 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_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_VariableLeaseCost_b97a0a1b-4495-41ce-9014-ed3bba7d78bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_9ca74882-b46b-4458-ae18-249cd81509aa" 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_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_ShortTermLeaseCost_9ca74882-b46b-4458-ae18-249cd81509aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_df320926-7b7f-4bf0-b0d5-c7743fbc67fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_df320926-7b7f-4bf0-b0d5-c7743fbc67fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_181a91d3-bc39-4a56-a3fc-20fdd01593f3" 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_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_LeaseCost_181a91d3-bc39-4a56-a3fc-20fdd01593f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_b5eee236-2fad-4abb-9349-2c30a029bad1" 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_LesseeLeaseDescriptionLineItems_f0948181-7f9d-4768-b28a-918b424fd74c" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_b5eee236-2fad-4abb-9349-2c30a029bad1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_70c3012e-6b2c-48a9-a61f-5861581bdc76" 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_b5eee236-2fad-4abb-9349-2c30a029bad1" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_70c3012e-6b2c-48a9-a61f-5861581bdc76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_70c3012e-6b2c-48a9-a61f-5861581bdc76_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_70c3012e-6b2c-48a9-a61f-5861581bdc76" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_70c3012e-6b2c-48a9-a61f-5861581bdc76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_58e34575-1d15-4f5b-998b-ad6276f0c888" 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_70c3012e-6b2c-48a9-a61f-5861581bdc76" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_58e34575-1d15-4f5b-998b-ad6276f0c888" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LandRightsMember_65581495-58a5-458c-a1b7-518c93bbe6f1" xlink:href="glpi-20220930.xsd#glpi_LandRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_58e34575-1d15-4f5b-998b-ad6276f0c888" xlink:to="loc_glpi_LandRightsMember_65581495-58a5-458c-a1b7-518c93bbe6f1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtScheduleofDebtDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LongtermDebtScheduleofDebtDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtScheduleofDebtDetails" xlink:type="extended" id="i923dbfb7d1e444158d3aa479c886d684_LongtermDebtScheduleofDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" 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_bcd4bfc4-5f6f-4710-91eb-0077bf0b6bd7" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_bcd4bfc4-5f6f-4710-91eb-0077bf0b6bd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LongTermDebtGrossandLeaseObligations_7e100ba1-d838-4282-909f-1eda374d7e19" xlink:href="glpi-20220930.xsd#glpi_LongTermDebtGrossandLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_glpi_LongTermDebtGrossandLeaseObligations_7e100ba1-d838-4282-909f-1eda374d7e19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_ca53e405-a4ee-4aea-a6d3-9d2e7df1a88b" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_ca53e405-a4ee-4aea-a6d3-9d2e7df1a88b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_d16eebf7-603d-4509-a4d7-d83cb38a8ca2" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_d16eebf7-603d-4509-a4d7-d83cb38a8ca2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_8d4fb75f-9af3-4020-84c2-d5e55ff78e3a" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_8d4fb75f-9af3-4020-84c2-d5e55ff78e3a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_11ce5f17-2594-41a8-9a2a-902815b9e7c2" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_11ce5f17-2594-41a8-9a2a-902815b9e7c2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ee35255b-d649-4bea-a726-9981dbc2fe5a" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ee35255b-d649-4bea-a726-9981dbc2fe5a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_f5dcd96e-052d-4b6e-ac7a-475243032703" 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_26b9d2e0-7b75-46e1-90a1-d4b55b3a1594" xlink:to="loc_us-gaap_DebtInstrumentTable_f5dcd96e-052d-4b6e-ac7a-475243032703" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_268e4e29-0b7d-4190-8164-e13dfc5a4f77" 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_f5dcd96e-052d-4b6e-ac7a-475243032703" xlink:to="loc_us-gaap_DebtInstrumentAxis_268e4e29-0b7d-4190-8164-e13dfc5a4f77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_268e4e29-0b7d-4190-8164-e13dfc5a4f77_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_268e4e29-0b7d-4190-8164-e13dfc5a4f77" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_268e4e29-0b7d-4190-8164-e13dfc5a4f77_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" 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_268e4e29-0b7d-4190-8164-e13dfc5a4f77" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_973419c2-418a-4a3e-a68b-247b7a32cbc7" 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_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_973419c2-418a-4a3e-a68b-247b7a32cbc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_b303fc52-4072-4ed8-9152-f0fd8a5f148a" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes5.375PercentDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2023Member_b303fc52-4072-4ed8-9152-f0fd8a5f148a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_b6fe8140-0e9a-4079-8447-4742a38f8c09" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes3.35PercentDue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes3.35PercentDue2024Member_b6fe8140-0e9a-4079-8447-4742a38f8c09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.250PercentDue2025Member_80667bef-d8c2-4053-8aef-bc67ce5ac320" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes5.250PercentDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes5.250PercentDue2025Member_80667bef-d8c2-4053-8aef-bc67ce5ac320" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2026Member_6a1fffdd-09e8-4a8f-b33c-419c5aba59c2" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes5.375PercentDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes5.375PercentDue2026Member_6a1fffdd-09e8-4a8f-b33c-419c5aba59c2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.750PercentDue2028Member_0141008c-938a-4f20-84a8-c34cd5afc7cd" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes5.750PercentDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes5.750PercentDue2028Member_0141008c-938a-4f20-84a8-c34cd5afc7cd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes5.300PercentDue2029Member_f2960d41-b6ad-443c-8118-b12bcbda8344" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes5.300PercentDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes5.300PercentDue2029Member_f2960d41-b6ad-443c-8118-b12bcbda8344" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_93617f78-5598-4b7f-b1d7-1043ebf74abc" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes4.00PercentDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes4.00PercentDue2030Member_93617f78-5598-4b7f-b1d7-1043ebf74abc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanA2FacilityMember_3f90ebb4-2c9e-4370-a08e-8e07725864cb" xlink:href="glpi-20220930.xsd#glpi_TermLoanA2FacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_TermLoanA2FacilityMember_3f90ebb4-2c9e-4370-a08e-8e07725864cb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_b633cc9a-c602-4229-af5a-645b698c4946" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes400PercentDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes400PercentDue2031Member_b633cc9a-c602-4229-af5a-645b698c4946" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_6ad62278-b79d-4023-974f-137da5a92246" xlink:href="glpi-20220930.xsd#glpi_SeniorUnsecuredNotes325PercentDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b311c3ba-1e13-4ea2-b2be-c54f53179b62" xlink:to="loc_glpi_SeniorUnsecuredNotes325PercentDue2032Member_6ad62278-b79d-4023-974f-137da5a92246" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_bbaf02f1-02a3-46fc-b419-5ad525c4d623" 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_f5dcd96e-052d-4b6e-ac7a-475243032703" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_bbaf02f1-02a3-46fc-b419-5ad525c4d623" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_bbaf02f1-02a3-46fc-b419-5ad525c4d623_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_bbaf02f1-02a3-46fc-b419-5ad525c4d623" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_bbaf02f1-02a3-46fc-b419-5ad525c4d623_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_00060e5b-9b23-400a-8456-54cce0545c77" 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_bbaf02f1-02a3-46fc-b419-5ad525c4d623" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_00060e5b-9b23-400a-8456-54cce0545c77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OtherDebtMember_48d1ed07-8f67-45a5-9ea9-b6fecdf30369" xlink:href="glpi-20220930.xsd#glpi_OtherDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_00060e5b-9b23-400a-8456-54cce0545c77" xlink:to="loc_glpi_OtherDebtMember_48d1ed07-8f67-45a5-9ea9-b6fecdf30369" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_4c79325f-a8f6-422e-919a-687a242e5874" 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_f5dcd96e-052d-4b6e-ac7a-475243032703" xlink:to="loc_us-gaap_CreditFacilityAxis_4c79325f-a8f6-422e-919a-687a242e5874" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_4c79325f-a8f6-422e-919a-687a242e5874_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_4c79325f-a8f6-422e-919a-687a242e5874" xlink:to="loc_us-gaap_CreditFacilityDomain_4c79325f-a8f6-422e-919a-687a242e5874_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_55947194-4064-43cb-abc8-3bf8887e69b4" 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_4c79325f-a8f6-422e-919a-687a242e5874" xlink:to="loc_us-gaap_CreditFacilityDomain_55947194-4064-43cb-abc8-3bf8887e69b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_66af97bf-60a1-4e3b-b052-5b006a80b7fa" 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_55947194-4064-43cb-abc8-3bf8887e69b4" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_66af97bf-60a1-4e3b-b052-5b006a80b7fa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredCreditFacilityNarrativeDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LongtermDebtSeniorUnsecuredCreditFacilityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredCreditFacilityNarrativeDetails" xlink:type="extended" id="i024bff51cd6a4e058609bae2eee12d79_LongtermDebtSeniorUnsecuredCreditFacilityNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_af6fceba-7da5-4948-a0b0-d07ef50bc388" 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_daafc5b7-3058-41a1-bf76-964000aadf56" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_daafc5b7-3058-41a1-bf76-964000aadf56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_3c262b4b-14a2-4d23-9a44-e50c94385bba" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_3c262b4b-14a2-4d23-9a44-e50c94385bba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_24c37ce0-1882-421e-808e-2d64e973f286" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_24c37ce0-1882-421e-808e-2d64e973f286" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_18b7640b-610d-495e-8303-1f2e3ee0256c" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_18b7640b-610d-495e-8303-1f2e3ee0256c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5a19009c-12c0-4b4b-a4c0-e33a89b28a76" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5a19009c-12c0-4b4b-a4c0-e33a89b28a76" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_77e680dc-de21-469e-a5cb-c0eef3752bd4" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_77e680dc-de21-469e-a5cb-c0eef3752bd4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_d0a46d00-86d5-4950-944c-596571479292" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_d0a46d00-86d5-4950-944c-596571479292" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_3a4cc567-e7a0-4ce9-814a-449adbfbf909" 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_af6fceba-7da5-4948-a0b0-d07ef50bc388" xlink:to="loc_us-gaap_DebtInstrumentTable_3a4cc567-e7a0-4ce9-814a-449adbfbf909" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_54d67c86-02d4-411c-82cd-40f9ee146825" 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_3a4cc567-e7a0-4ce9-814a-449adbfbf909" xlink:to="loc_us-gaap_CreditFacilityAxis_54d67c86-02d4-411c-82cd-40f9ee146825" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_54d67c86-02d4-411c-82cd-40f9ee146825_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_54d67c86-02d4-411c-82cd-40f9ee146825" xlink:to="loc_us-gaap_CreditFacilityDomain_54d67c86-02d4-411c-82cd-40f9ee146825_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d99835c7-511c-4779-9c81-9cff8f549755" 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_54d67c86-02d4-411c-82cd-40f9ee146825" xlink:to="loc_us-gaap_CreditFacilityDomain_d99835c7-511c-4779-9c81-9cff8f549755" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_DelayedDrawMember_447354ef-5d27-46c1-bc9d-4d26922a1ee0" xlink:href="glpi-20220930.xsd#glpi_DelayedDrawMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d99835c7-511c-4779-9c81-9cff8f549755" xlink:to="loc_glpi_DelayedDrawMember_447354ef-5d27-46c1-bc9d-4d26922a1ee0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_220e995e-8362-4ec6-8038-f0991b3f61a3" 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_d99835c7-511c-4779-9c81-9cff8f549755" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_220e995e-8362-4ec6-8038-f0991b3f61a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TermLoanA2FacilityMember_0f76ac1e-01f7-4d93-b3d0-47273dc6d1ad" xlink:href="glpi-20220930.xsd#glpi_TermLoanA2FacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d99835c7-511c-4779-9c81-9cff8f549755" xlink:to="loc_glpi_TermLoanA2FacilityMember_0f76ac1e-01f7-4d93-b3d0-47273dc6d1ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_9c3e4e76-6eb8-4a9f-9599-5851987b53c1" 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_3a4cc567-e7a0-4ce9-814a-449adbfbf909" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_9c3e4e76-6eb8-4a9f-9599-5851987b53c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_9c3e4e76-6eb8-4a9f-9599-5851987b53c1_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_9c3e4e76-6eb8-4a9f-9599-5851987b53c1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_9c3e4e76-6eb8-4a9f-9599-5851987b53c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_99ce5ecc-1e06-4c17-a4b3-b7230c87f82d" 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_9c3e4e76-6eb8-4a9f-9599-5851987b53c1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_99ce5ecc-1e06-4c17-a4b3-b7230c87f82d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_f3ef3739-45d8-4ab1-af55-61a96015ff05" 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_99ce5ecc-1e06-4c17-a4b3-b7230c87f82d" xlink:to="loc_us-gaap_LineOfCreditMember_f3ef3739-45d8-4ab1-af55-61a96015ff05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_e3101388-8df4-4b0c-a881-0d4a9c1a8142" 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_99ce5ecc-1e06-4c17-a4b3-b7230c87f82d" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_e3101388-8df4-4b0c-a881-0d4a9c1a8142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f36a1282-0f11-42db-b6e8-17b7ae4c0fec" 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_3a4cc567-e7a0-4ce9-814a-449adbfbf909" xlink:to="loc_srt_RangeAxis_f36a1282-0f11-42db-b6e8-17b7ae4c0fec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f36a1282-0f11-42db-b6e8-17b7ae4c0fec_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_f36a1282-0f11-42db-b6e8-17b7ae4c0fec" xlink:to="loc_srt_RangeMember_f36a1282-0f11-42db-b6e8-17b7ae4c0fec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_457c1b60-1dc2-4e0d-a377-2fd08dc6eace" 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_f36a1282-0f11-42db-b6e8-17b7ae4c0fec" xlink:to="loc_srt_RangeMember_457c1b60-1dc2-4e0d-a377-2fd08dc6eace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_26fe83ab-eb0e-4df8-9521-5eca2e5fa432" 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_457c1b60-1dc2-4e0d-a377-2fd08dc6eace" xlink:to="loc_srt_MinimumMember_26fe83ab-eb0e-4df8-9521-5eca2e5fa432" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_12df5edf-e767-4eba-aa40-f795eb682537" 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_457c1b60-1dc2-4e0d-a377-2fd08dc6eace" xlink:to="loc_srt_MaximumMember_12df5edf-e767-4eba-aa40-f795eb682537" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_49ad21e7-e317-47af-b732-80fd543f3017" 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_3a4cc567-e7a0-4ce9-814a-449adbfbf909" xlink:to="loc_us-gaap_VariableRateAxis_49ad21e7-e317-47af-b732-80fd543f3017" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_49ad21e7-e317-47af-b732-80fd543f3017_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_49ad21e7-e317-47af-b732-80fd543f3017" xlink:to="loc_us-gaap_VariableRateDomain_49ad21e7-e317-47af-b732-80fd543f3017_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_266fa155-7c18-49de-9c0f-61e9b1908a1c" 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_49ad21e7-e317-47af-b732-80fd543f3017" xlink:to="loc_us-gaap_VariableRateDomain_266fa155-7c18-49de-9c0f-61e9b1908a1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_5fed8e6b-261f-4601-8964-d08c1149b27c" 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_266fa155-7c18-49de-9c0f-61e9b1908a1c" xlink:to="loc_us-gaap_BaseRateMember_5fed8e6b-261f-4601-8964-d08c1149b27c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SecuredOvernightFinancingRateSOFRMember_ed45d04c-2067-4dab-93b3-5013bab0ec07" xlink:href="glpi-20220930.xsd#glpi_SecuredOvernightFinancingRateSOFRMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_266fa155-7c18-49de-9c0f-61e9b1908a1c" xlink:to="loc_glpi_SecuredOvernightFinancingRateSOFRMember_ed45d04c-2067-4dab-93b3-5013bab0ec07" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredNotesNarrativeDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#LongtermDebtSeniorUnsecuredNotesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/LongtermDebtSeniorUnsecuredNotesNarrativeDetails" xlink:type="extended" id="ib80d4b2807c4480eb66decda92a50058_LongtermDebtSeniorUnsecuredNotesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_d87b77a7-b4fa-4767-8f57-2d803306026f" 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_4bd5f524-2c89-457a-9e20-c178c11ac463" 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_d87b77a7-b4fa-4767-8f57-2d803306026f" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_4bd5f524-2c89-457a-9e20-c178c11ac463" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_302c5ecb-7ace-4b7e-b934-bf07385ee715" 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_d87b77a7-b4fa-4767-8f57-2d803306026f" xlink:to="loc_us-gaap_DebtInstrumentTable_302c5ecb-7ace-4b7e-b934-bf07385ee715" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_09045fe1-ff96-45ba-8c61-c12cab4e540c" 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_302c5ecb-7ace-4b7e-b934-bf07385ee715" xlink:to="loc_us-gaap_DebtInstrumentAxis_09045fe1-ff96-45ba-8c61-c12cab4e540c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_09045fe1-ff96-45ba-8c61-c12cab4e540c_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_09045fe1-ff96-45ba-8c61-c12cab4e540c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_09045fe1-ff96-45ba-8c61-c12cab4e540c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ea2667d0-57d5-4d80-8c97-d7def7077a69" 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_09045fe1-ff96-45ba-8c61-c12cab4e540c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ea2667d0-57d5-4d80-8c97-d7def7077a69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_cb143a81-0142-45e7-903a-b0bba7d9e4f1" 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_ea2667d0-57d5-4d80-8c97-d7def7077a69" xlink:to="loc_us-gaap_SeniorNotesMember_cb143a81-0142-45e7-903a-b0bba7d9e4f1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended" id="idbd3e99b11de48e092ba1b0bf0e57dda_FairValueofFinancialAssetsandLiabilitiesFairValueofFinancialAssetsandLIabilitiesAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_6d93b045-767c-4ce6-8d50-f236fbd283d6" 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_4ad4ff9b-140a-4ef7-bb8c-2869763a94ac" 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_6d93b045-767c-4ce6-8d50-f236fbd283d6" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4ad4ff9b-140a-4ef7-bb8c-2869763a94ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_368d57fc-6c2d-418b-adbb-7026a930382e" 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_4ad4ff9b-140a-4ef7-bb8c-2869763a94ac" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_368d57fc-6c2d-418b-adbb-7026a930382e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesFairValueDisclosure_0bf48085-f064-43fd-911d-87ba898518f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReceivablesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4ad4ff9b-140a-4ef7-bb8c-2869763a94ac" xlink:to="loc_us-gaap_ReceivablesFairValueDisclosure_0bf48085-f064-43fd-911d-87ba898518f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Deferredcompensationplanassetsfairvaluedisclosure_b2c9ce2a-7749-4cf9-bf6a-94bc4db70323" xlink:href="glpi-20220930.xsd#glpi_Deferredcompensationplanassetsfairvaluedisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4ad4ff9b-140a-4ef7-bb8c-2869763a94ac" xlink:to="loc_glpi_Deferredcompensationplanassetsfairvaluedisclosure_b2c9ce2a-7749-4cf9-bf6a-94bc4db70323" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_43ecf288-67d4-4771-9e23-12c06843f7fe" 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_6d93b045-767c-4ce6-8d50-f236fbd283d6" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_43ecf288-67d4-4771-9e23-12c06843f7fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_370714fe-1b0d-4420-a213-d7a02cbaba2e" 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_43ecf288-67d4-4771-9e23-12c06843f7fe" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_370714fe-1b0d-4420-a213-d7a02cbaba2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditFairValueDisclosure_5047eb01-3e5f-4c6c-84fc-d46f69f36104" 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_370714fe-1b0d-4420-a213-d7a02cbaba2e" xlink:to="loc_us-gaap_LinesOfCreditFairValueDisclosure_5047eb01-3e5f-4c6c-84fc-d46f69f36104" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_cf6898b5-f7ff-49d1-9906-878a1df21057" 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_370714fe-1b0d-4420-a213-d7a02cbaba2e" xlink:to="loc_us-gaap_NotesPayableFairValueDisclosure_cf6898b5-f7ff-49d1-9906-878a1df21057" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovements_bd435815-641b-4e94-b1c7-c3442507ff35" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandAndLandImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_6d93b045-767c-4ce6-8d50-f236fbd283d6" xlink:to="loc_us-gaap_LandAndLandImprovements_bd435815-641b-4e94-b1c7-c3442507ff35" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_845dd9a5-8a16-40cb-94b1-f068b039ae5e" 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_6d93b045-767c-4ce6-8d50-f236fbd283d6" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_845dd9a5-8a16-40cb-94b1-f068b039ae5e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_bb503627-e426-41d1-93c2-7735fc278897" 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_845dd9a5-8a16-40cb-94b1-f068b039ae5e" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_bb503627-e426-41d1-93c2-7735fc278897" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bb503627-e426-41d1-93c2-7735fc278897_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_bb503627-e426-41d1-93c2-7735fc278897" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bb503627-e426-41d1-93c2-7735fc278897_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_eb2413d7-88f9-4b29-b9be-5afb28093a26" 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_bb503627-e426-41d1-93c2-7735fc278897" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_eb2413d7-88f9-4b29-b9be-5afb28093a26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d1cfed5f-180e-456b-8497-f8b016adc475" 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_eb2413d7-88f9-4b29-b9be-5afb28093a26" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d1cfed5f-180e-456b-8497-f8b016adc475" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_cb68fc50-ab5d-4b96-89ef-1036c505b5e4" 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_eb2413d7-88f9-4b29-b9be-5afb28093a26" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_cb68fc50-ab5d-4b96-89ef-1036c505b5e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_dc7597cf-bed1-4734-a8fc-80f421c2b2fc" 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_eb2413d7-88f9-4b29-b9be-5afb28093a26" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_dc7597cf-bed1-4734-a8fc-80f421c2b2fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_845dd9a5-8a16-40cb-94b1-f068b039ae5e" xlink:to="loc_glpi_TriggeringEventAxis_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab_default" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab" xlink:to="loc_glpi_TriggeringEventDomain_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_9e741412-cdc7-4ef1-8d3e-ac10b299df6f" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_94eb2b39-e3fe-4bf6-b453-68bb60ba74ab" xlink:to="loc_glpi_TriggeringEventDomain_9e741412-cdc7-4ef1-8d3e-ac10b299df6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SEInletPropertiesMember_a524bb28-95c7-473f-88ca-9d8f517c5416" xlink:href="glpi-20220930.xsd#glpi_SEInletPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_9e741412-cdc7-4ef1-8d3e-ac10b299df6f" xlink:to="loc_glpi_SEInletPropertiesMember_a524bb28-95c7-473f-88ca-9d8f517c5416" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended" id="ife2fb4f4774f4e0fb87d40ecd88841a3_RevenueRecognitionNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRealEstateProperties_9514ee06-71ca-4c33-b293-b165c8520d05" 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_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_us-gaap_NumberOfRealEstateProperties_9514ee06-71ca-4c33-b293-b165c8520d05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods_84caeda4-8f3c-45bb-bbcd-2b0953e3479d" xlink:href="glpi-20220930.xsd#glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_Lessorleasingarrangementstermofcontractincludingallreasonablyassuredrenewalperiods_84caeda4-8f3c-45bb-bbcd-2b0953e3479d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_be236fbe-066c-4318-a3a5-fd01d9460540" 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_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_be236fbe-066c-4318-a3a5-fd01d9460540" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_5ace8dbe-c4d1-455d-9874-f370a3c63f58" xlink:href="glpi-20220930.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_5ace8dbe-c4d1-455d-9874-f370a3c63f58" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_c24fa13e-999b-4fba-8c25-47a3848a6496" 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_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_c24fa13e-999b-4fba-8c25-47a3848a6496" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesannualrentalescalationpercentage_d6e24355-eb2d-43ba-98fe-42887a017f0d" xlink:href="glpi-20220930.xsd#glpi_Operatingleasesannualrentalescalationpercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_Operatingleasesannualrentalescalationpercentage_d6e24355-eb2d-43ba-98fe-42887a017f0d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_5863ac16-d995-4691-ac40-49f4138d0aeb" xlink:href="glpi-20220930.xsd#glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_Operatingleasespercentoftheaveragenetrevenuesofpropertysusedtocalculaterentincrease_5863ac16-d995-4691-ac40-49f4138d0aeb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_ced1dc89-51a1-4744-a576-cf0f09750569" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesAnnualRentEscalatorOveraPeriodofTimeContingentUpontheAchievementofCertainRentCoverageRatioThresholdPercentage_ced1dc89-51a1-4744-a576-cf0f09750569" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_7432b428-eb64-4827-8fd6-6cd9464f83f5" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesPeriodExistingUponTriggeringAnnualRentEscalatorReset_7432b428-eb64-4827-8fd6-6cd9464f83f5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_41decebe-92fb-4be7-b48e-afa73627814d" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_41decebe-92fb-4be7-b48e-afa73627814d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_206cd2ac-c6d5-4120-ae3e-bcae6151b240" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesPercentagetoWhichRentEscalationWillbeReducedUponAchievementofCertainThreshold_206cd2ac-c6d5-4120-ae3e-bcae6151b240" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_ab61be01-f7b2-4552-8b84-8251fe058f4f" xlink:href="glpi-20220930.xsd#glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_Operatingleasesfrequencythepropertyperformancebasedrentstructureisadjusted_ab61be01-f7b2-4552-8b84-8251fe058f4f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues_ff7787b2-f01c-405e-adab-064084ed99bc" xlink:href="glpi-20220930.xsd#glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_LessorLeasingArrangementsPeriodUsedinCalculationofAverageNetRevenues_ff7787b2-f01c-405e-adab-064084ed99bc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease_6630d6e1-b6b7-465f-9651-58f99947d121" xlink:href="glpi-20220930.xsd#glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_PercentageoftheChangeinNetRevenuesfromthePrecedingMonthUsedToComputeMonthlyRentPaymentsUnderPennMasterLease_6630d6e1-b6b7-465f-9651-58f99947d121" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfMiles_b21d73a3-208f-4438-9854-092a5dd383a2" xlink:href="glpi-20220930.xsd#glpi_NumberOfMiles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_NumberOfMiles_b21d73a3-208f-4438-9854-092a5dd383a2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through4_6aa69cac-f3fb-49cd-854a-72c134e1572d" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear2Through4"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through4_6aa69cac-f3fb-49cd-854a-72c134e1572d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndAfter_7745a837-ff42-42d8-87f4-062f6c6dc4c7" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear5AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndAfter_7745a837-ff42-42d8-87f4-062f6c6dc4c7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_0cd1c25c-5645-4d74-beae-ca31fb57a157" xlink:href="glpi-20220930.xsd#glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_NumberOfFacilitiesWhoseRealEstatePropertyIsIncludedInEntityPortfolio_0cd1c25c-5645-4d74-beae-ca31fb57a157" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_d9c8edd4-c3ab-4167-b4fc-f471751742de" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear5AndYear6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear5AndYear6_d9c8edd4-c3ab-4167-b4fc-f471751742de" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_a3821cca-b5d6-423a-9510-4b7cf69e03fc" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear7AndYear8"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear7AndYear8_a3821cca-b5d6-423a-9510-4b7cf69e03fc" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_524e5693-1b64-45aa-bb56-ef9a73278d25" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorAfterYear9"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorAfterYear9_524e5693-1b64-45aa-bb56-ef9a73278d25" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_e654c463-dab4-4dc9-8a1d-a730237fd706" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear2Through5"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear2Through5_e654c463-dab4-4dc9-8a1d-a730237fd706" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear6And7_98c05e82-1af9-411b-8b65-f14e7f5c7e36" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear6And7"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear6And7_98c05e82-1af9-411b-8b65-f14e7f5c7e36" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_f0805c8c-b0de-4cf0-b120-5c0c20491a12" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear8AndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear8AndAfter_f0805c8c-b0de-4cf0-b120-5c0c20491a12" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_ab1c3395-32d4-46fe-a3ff-d28b5ec784df" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseRentEscalatorYear1Through6"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeaseRentEscalatorYear1Through6_ab1c3395-32d4-46fe-a3ff-d28b5ec784df" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_0cda93d8-914c-4b9a-9d29-5b6c09e00070" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_0cda93d8-914c-4b9a-9d29-5b6c09e00070" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_811db6f8-16db-49c8-9eab-72400c9d8c93" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexIncrease_811db6f8-16db-49c8-9eab-72400c9d8c93" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_55a92cb6-432c-489c-87a1-9321c323dc61" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationConsumerPriceIndexNoRentIncrease_55a92cb6-432c-489c-87a1-9321c323dc61" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_1860a0f5-2ec9-4b68-9dc3-180edc93d05e" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_1860a0f5-2ec9-4b68-9dc3-180edc93d05e" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bcf1aa6c-0098-4ae3-9c2f-83329653c6bf" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37" 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_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37_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_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9e988814-9954-4a08-8819-962066c2e69d" 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_f3b486c2-f9a3-470d-94fb-57d5fe9f0e37" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9e988814-9954-4a08-8819-962066c2e69d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember_470ac276-aa0b-480e-8a7b-8c5e9b24134c" xlink:href="glpi-20220930.xsd#glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9e988814-9954-4a08-8819-962066c2e69d" xlink:to="loc_glpi_AllPropertiesUnderthePennMasterLeaseExceptHollywoodCasinoColumbusandHollywoodCasinoToledoMember_470ac276-aa0b-480e-8a7b-8c5e9b24134c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember_26dce1bb-c079-4d59-9ddd-885ba0e94b00" xlink:href="glpi-20220930.xsd#glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9e988814-9954-4a08-8819-962066c2e69d" xlink:to="loc_glpi_HollywoodCasinoColumbusAndHollywoodCasinoToledoMember_26dce1bb-c079-4d59-9ddd-885ba0e94b00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_dfeae13b-e949-4cd1-a9ab-5431c8017864" 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_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:to="loc_us-gaap_LeaseContractualTermAxis_dfeae13b-e949-4cd1-a9ab-5431c8017864" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_dfeae13b-e949-4cd1-a9ab-5431c8017864_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_dfeae13b-e949-4cd1-a9ab-5431c8017864" xlink:to="loc_us-gaap_LeaseContractualTermDomain_dfeae13b-e949-4cd1-a9ab-5431c8017864_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" 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_dfeae13b-e949-4cd1-a9ab-5431c8017864" xlink:to="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_cff59183-2939-4329-a661-a3b2c58b15bb" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_cff59183-2939-4329-a661-a3b2c58b15bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_82fb37ee-8b7e-40d5-9f82-44d8d7ac0d2f" xlink:href="glpi-20220930.xsd#glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_AmendedPinnacleEntertainmentInc.MasterLeaseMember_82fb37ee-8b7e-40d5-9f82-44d8d7ac0d2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_78a95f7c-9b9e-4fa8-a604-e1ea88ca3f32" xlink:href="glpi-20220930.xsd#glpi_AmendedAndRestatedCaesarsMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_AmendedAndRestatedCaesarsMasterLeaseMember_78a95f7c-9b9e-4fa8-a604-e1ea88ca3f32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BoydGamingCorporationMasterLeaseMember_d0cf4d9f-53d6-4147-b293-2fea5da38394" xlink:href="glpi-20220930.xsd#glpi_BoydGamingCorporationMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_BoydGamingCorporationMasterLeaseMember_d0cf4d9f-53d6-4147-b293-2fea5da38394" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BelterraParkLeaseMember_3c9a11ed-648a-4a0a-b9ea-bf7ef68054c1" xlink:href="glpi-20220930.xsd#glpi_BelterraParkLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_BelterraParkLeaseMember_3c9a11ed-648a-4a0a-b9ea-bf7ef68054c1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_f68be951-c199-41ed-bf2e-22d00ec9ab42" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingInc.MeadowsLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_PennNationalGamingInc.MeadowsLeaseMember_f68be951-c199-41ed-bf2e-22d00ec9ab42" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenLeaseMember_5b17b2ba-79a6-4427-b796-7111efdaf860" xlink:href="glpi-20220930.xsd#glpi_CasinoQueenLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_CasinoQueenLeaseMember_5b17b2ba-79a6-4427-b796-7111efdaf860" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EldoradoMasterLeaseMember_d33d5d82-e857-4602-9697-e7a4468522fd" xlink:href="glpi-20220930.xsd#glpi_EldoradoMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_EldoradoMasterLeaseMember_d33d5d82-e857-4602-9697-e7a4468522fd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_8e0bd0c3-2c39-455e-9bf5-9945520cd2f1" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_BallysMasterLeaseMember_8e0bd0c3-2c39-455e-9bf5-9945520cd2f1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_MorgantownLeaseMember_8b73c7b4-6f60-4432-919d-fcbe21d0d013" xlink:href="glpi-20220930.xsd#glpi_MorgantownLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_MorgantownLeaseMember_8b73c7b4-6f60-4432-919d-fcbe21d0d013" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PerryvilleLeaseMember_d1ef068c-a7ec-472b-88f4-6fafd99b7df1" xlink:href="glpi-20220930.xsd#glpi_PerryvilleLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_PerryvilleLeaseMember_d1ef068c-a7ec-472b-88f4-6fafd99b7df1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_CasinoQueenMasterLeaseMember_083ccd08-fe91-428a-b9d6-957d635e146d" xlink:href="glpi-20220930.xsd#glpi_CasinoQueenMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_CasinoQueenMasterLeaseMember_083ccd08-fe91-428a-b9d6-957d635e146d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_97725224-cd76-4b1a-b06f-1fd3a6b66780" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_97725224-cd76-4b1a-b06f-1fd3a6b66780" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_af6779ea-9c0d-47b5-86f0-33e2fb4ae4ad" xlink:href="glpi-20220930.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_PALiveMasterLeaseMember_af6779ea-9c0d-47b5-86f0-33e2fb4ae4ad" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LumierePlaceLeaseMember_23282b9b-dddb-4b1e-898d-b848b17aa230" xlink:href="glpi-20220930.xsd#glpi_LumierePlaceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_LumierePlaceLeaseMember_23282b9b-dddb-4b1e-898d-b848b17aa230" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_IsleOfCapriWaterlooAndIsleOfCapriBettendorfMember_106ca001-41e1-4cdc-9893-b778152cfe05" xlink:href="glpi-20220930.xsd#glpi_IsleOfCapriWaterlooAndIsleOfCapriBettendorfMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_IsleOfCapriWaterlooAndIsleOfCapriBettendorfMember_106ca001-41e1-4cdc-9893-b778152cfe05" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasLeaseMember_da4f6112-ed42-4e5e-9a2d-f5ee957614aa" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_c8b9e22a-e5bc-44b3-97c3-6d377d07cf92" xlink:to="loc_glpi_TropicanaLasVegasLeaseMember_da4f6112-ed42-4e5e-9a2d-f5ee957614aa" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_77503d97-b1b4-425f-95bf-3ed6e443c6bc" 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_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:to="loc_srt_MajorCustomersAxis_77503d97-b1b4-425f-95bf-3ed6e443c6bc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_77503d97-b1b4-425f-95bf-3ed6e443c6bc_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_77503d97-b1b4-425f-95bf-3ed6e443c6bc" xlink:to="loc_srt_NameOfMajorCustomerDomain_77503d97-b1b4-425f-95bf-3ed6e443c6bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_42dba2bc-9426-4f43-b178-1beaa99643a5" 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_77503d97-b1b4-425f-95bf-3ed6e443c6bc" xlink:to="loc_srt_NameOfMajorCustomerDomain_42dba2bc-9426-4f43-b178-1beaa99643a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseMember_958525ab-902b-4658-84f2-7372c16367da" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_42dba2bc-9426-4f43-b178-1beaa99643a5" xlink:to="loc_glpi_BallysMasterLeaseMember_958525ab-902b-4658-84f2-7372c16367da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_a737a5b4-fb6f-46ed-9867-bed2b707f5ff" xlink:href="glpi-20220930.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_42dba2bc-9426-4f43-b178-1beaa99643a5" xlink:to="loc_glpi_PALiveMasterLeaseMember_a737a5b4-fb6f-46ed-9867-bed2b707f5ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_3b714329-7860-4b81-8afe-51b134bcf6fc" 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_DisaggregationOfRevenueTable_e7d52223-aa29-48ee-8040-dadeb45931b4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_3b714329-7860-4b81-8afe-51b134bcf6fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3b714329-7860-4b81-8afe-51b134bcf6fc_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_3b714329-7860-4b81-8afe-51b134bcf6fc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3b714329-7860-4b81-8afe-51b134bcf6fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a7a182fd-07d7-41b1-9b47-45223232d208" 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_3b714329-7860-4b81-8afe-51b134bcf6fc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a7a182fd-07d7-41b1-9b47-45223232d208" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaEntertainmentMember_4fb190ae-52c6-413b-90d9-b85d0f4f2a74" xlink:href="glpi-20220930.xsd#glpi_TropicanaEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a7a182fd-07d7-41b1-9b47-45223232d208" xlink:to="loc_glpi_TropicanaEntertainmentMember_4fb190ae-52c6-413b-90d9-b85d0f4f2a74" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/RevenueRecognitionRentalIncomeTableDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#RevenueRecognitionRentalIncomeTableDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/RevenueRecognitionRentalIncomeTableDetails" xlink:type="extended" id="i5ff382189626400f9d232145896a59b7_RevenueRecognitionRentalIncomeTableDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" 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_c55166ab-1082-4213-9d43-3412b4023189" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_c55166ab-1082-4213-9d43-3412b4023189" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StraightLineRentAdjustments_caf4e8d0-c187-4016-8edd-d245b8e1db6a" 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_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_StraightLineRentAdjustments_caf4e8d0-c187-4016-8edd-d245b8e1db6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseGroundLeaseIncome_a31ad451-b765-4d05-a0c9-b1c7078d2638" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseGroundLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeaseGroundLeaseIncome_a31ad451-b765-4d05-a0c9-b1c7078d2638" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_64b332e9-b574-40ac-a255-bd9a827917ce" 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_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_64b332e9-b574-40ac-a255-bd9a827917ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseOtherRentalRevenue_d8bf7453-534b-4af4-ac93-80b16a9c6752" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseOtherRentalRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeaseOtherRentalRevenue_d8bf7453-534b-4af4-ac93-80b16a9c6752" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_13b8083f-5c89-422f-a622-ddbc225c506d" 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_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_Revenues_13b8083f-5c89-422f-a622-ddbc225c506d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivable_fd02cd3a-9819-49e0-af75-491957b148b0" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivable_fd02cd3a-9819-49e0-af75-491957b148b0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsNet_d63e1fe3-4850-4d10-a7e2-8ae3ec876e37" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsNet_d63e1fe3-4850-4d10-a7e2-8ae3ec876e37" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceived_e5bb435a-b534-4d1a-9b83-19ed47a2b7f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceived_e5bb435a-b534-4d1a-9b83-19ed47a2b7f3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognized_b29455ff-2d8a-4679-a515-e10d7a67a38e" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognized_b29455ff-2d8a-4679-a515-e10d7a67a38e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableThereafter_74160353-b68e-4604-a504-100cc3e5805e" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableThereafter_74160353-b68e-4604-a504-100cc3e5805e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorOperatingLeasePaymentToBeReceivedAfterYearFour_dcbc4df2-e7f9-4891-86cf-0bb990c85909" xlink:href="glpi-20220930.xsd#glpi_LessorOperatingLeasePaymentToBeReceivedAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_LessorOperatingLeasePaymentToBeReceivedAfterYearFour_dcbc4df2-e7f9-4891-86cf-0bb990c85909" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinFiveYears_dcf5dd77-c13d-4c2a-8e2b-1007f49f46eb" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedinFiveYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinFiveYears_dcf5dd77-c13d-4c2a-8e2b-1007f49f46eb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFiveYears_ebc9aee7-1374-4a64-96b8-31decba034fb" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFiveYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFiveYears_ebc9aee7-1374-4a64-96b8-31decba034fb" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsinFiveYears_eb533bac-1a8f-410c-919f-76a41c3e582c" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsinFiveYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsinFiveYears_eb533bac-1a8f-410c-919f-76a41c3e582c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_49e20a9a-4900-4b67-a645-2a4ed5ac0fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_49e20a9a-4900-4b67-a645-2a4ed5ac0fbe" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedThereafter_292513f6-e7e8-4e18-b57c-e08e43a87962" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedThereafter_292513f6-e7e8-4e18-b57c-e08e43a87962" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsThereafter_409bf8d5-add8-42f4-a168-80fe84851b64" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsThereafter_409bf8d5-add8-42f4-a168-80fe84851b64" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinFourYears_ad368578-6cd1-4761-9edd-61b2f421b1ed" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedinFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinFourYears_ad368578-6cd1-4761-9edd-61b2f421b1ed" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFourYears_688f350b-0fc3-41b9-ad39-2910559f37fa" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInFourYears_688f350b-0fc3-41b9-ad39-2910559f37fa" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsinFourYears_03293acf-6e61-4303-8e30-d879849465e7" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsinFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsinFourYears_03293acf-6e61-4303-8e30-d879849465e7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_781cc9cc-f145-454e-9009-4e1b0f00c748" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_781cc9cc-f145-454e-9009-4e1b0f00c748" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinThreeYears_f831f5c1-cc05-4bcc-8ba4-fd60e27c6573" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedinThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinThreeYears_f831f5c1-cc05-4bcc-8ba4-fd60e27c6573" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInThreeYears_afa9118f-9f14-4e88-ae60-a55589e9b824" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInThreeYears_afa9118f-9f14-4e88-ae60-a55589e9b824" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsinThreeYears_429db4c7-2573-4206-b745-31c099560cd2" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsinThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsinThreeYears_429db4c7-2573-4206-b745-31c099560cd2" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_f2140d9d-9856-4821-943a-74fbf1ad26c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_f2140d9d-9856-4821-943a-74fbf1ad26c2" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinTwoYears_99547fd2-d32a-4698-86bc-f155bd5d6086" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedinTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedinTwoYears_99547fd2-d32a-4698-86bc-f155bd5d6086" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInTwoYears_e0ab5f09-d494-4135-b429-556a4591160a" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableInTwoYears_e0ab5f09-d494-4135-b429-556a4591160a" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsinTwoYears_843dd06f-14ef-4ea2-9977-c04b27d25f9f" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsinTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsinTwoYears_843dd06f-14ef-4ea2-9977-c04b27d25f9f" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_6629af32-5538-4940-b18c-f103b06a08a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_6629af32-5538-4940-b18c-f103b06a08a3" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableCurrent_1d05009b-eb79-480d-8ed4-101a0c20ddfa" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureMinimumBaseGroundPaymentsReceivableCurrent_1d05009b-eb79-480d-8ed4-101a0c20ddfa" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_StraightLineRentAdjustmentsCurrent_633cb497-f6a3-4a4a-8ddb-8d30851e0416" xlink:href="glpi-20220930.xsd#glpi_StraightLineRentAdjustmentsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_StraightLineRentAdjustmentsCurrent_633cb497-f6a3-4a4a-8ddb-8d30851e0416" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_ed8c1a6d-f088-4d17-abfd-28b51db48f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_ed8c1a6d-f088-4d17-abfd-28b51db48f2c" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedCurrent_6f038d07-4b3c-446d-98cb-d044aff0c256" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesFutureIncometoBeRecognizedCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_glpi_OperatingLeasesFutureIncometoBeRecognizedCurrent_6f038d07-4b3c-446d-98cb-d044aff0c256" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_b3a0349f-02d9-49bb-91f9-6e37bfe47645" 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_91fb80d6-39cb-4df0-b57b-463763098211" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_b3a0349f-02d9-49bb-91f9-6e37bfe47645" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a2e036d7-408e-4192-b752-bf1ec13a6947" 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_b3a0349f-02d9-49bb-91f9-6e37bfe47645" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a2e036d7-408e-4192-b752-bf1ec13a6947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a2e036d7-408e-4192-b752-bf1ec13a6947_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_a2e036d7-408e-4192-b752-bf1ec13a6947" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a2e036d7-408e-4192-b752-bf1ec13a6947_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c520f44-76a8-4ece-ae7d-ed662d7d0c95" 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_a2e036d7-408e-4192-b752-bf1ec13a6947" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c520f44-76a8-4ece-ae7d-ed662d7d0c95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_1a5decc3-8a0e-4b10-a31f-a997758b00a9" 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_8c520f44-76a8-4ece-ae7d-ed662d7d0c95" xlink:to="loc_us-gaap_BuildingMember_1a5decc3-8a0e-4b10-a31f-a997758b00a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_705bfa3a-b5e3-4c52-949b-11fdbf644f31" 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_8c520f44-76a8-4ece-ae7d-ed662d7d0c95" xlink:to="loc_us-gaap_LandMember_705bfa3a-b5e3-4c52-949b-11fdbf644f31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_40627b0b-eced-4373-8ee9-1e5ba687cdc6" 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_b3a0349f-02d9-49bb-91f9-6e37bfe47645" xlink:to="loc_us-gaap_LeaseContractualTermAxis_40627b0b-eced-4373-8ee9-1e5ba687cdc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_40627b0b-eced-4373-8ee9-1e5ba687cdc6_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_40627b0b-eced-4373-8ee9-1e5ba687cdc6" xlink:to="loc_us-gaap_LeaseContractualTermDomain_40627b0b-eced-4373-8ee9-1e5ba687cdc6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_ffcb15e7-a5aa-4a08-be25-e852beb489dd" 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_40627b0b-eced-4373-8ee9-1e5ba687cdc6" xlink:to="loc_us-gaap_LeaseContractualTermDomain_ffcb15e7-a5aa-4a08-be25-e852beb489dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOperatingLeaseMember_81900d85-cbbf-4b82-b6ad-f2468a6bfa00" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertySubjectToOperatingLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_ffcb15e7-a5aa-4a08-be25-e852beb489dd" xlink:to="loc_us-gaap_PropertySubjectToOperatingLeaseMember_81900d85-cbbf-4b82-b6ad-f2468a6bfa00" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/EarningsperShareEarningsperShareWeightedAverageSharesOutstandingDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#EarningsperShareEarningsperShareWeightedAverageSharesOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/EarningsperShareEarningsperShareWeightedAverageSharesOutstandingDetails" xlink:type="extended" id="i330b194b9f0e4a67bb4316accf0215ab_EarningsperShareEarningsperShareWeightedAverageSharesOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:href="glpi-20220930.xsd#glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4d74ebc7-2d5d-4eb2-ac95-71d6d74c42fd" 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_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4d74ebc7-2d5d-4eb2-ac95-71d6d74c42fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_5bd66a39-6a4d-4ed0-90d1-a4f3656865a3" 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_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_5bd66a39-6a4d-4ed0-90d1-a4f3656865a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements_9625ec5f-03ac-4987-95ef-f92bbb005df5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements_9625ec5f-03ac-4987-95ef-f92bbb005df5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_cf0bca89-684b-4c06-8936-64eaf4080f8e" 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_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_cf0bca89-684b-4c06-8936-64eaf4080f8e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable_870c33d2-fbd0-46a3-a093-f96848d303f2" xlink:href="glpi-20220930.xsd#glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingLineItems_70a85fff-7440-46e9-89f1-0fc23fba3fdc" xlink:to="loc_glpi_ScheduleofBasicAndDilutedWeightedAverageCommonSharesOutstandingTable_870c33d2-fbd0-46a3-a093-f96848d303f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f6540225-6e2d-4779-aae4-bdb173e51720" 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_870c33d2-fbd0-46a3-a093-f96848d303f2" xlink:to="loc_us-gaap_AwardTypeAxis_f6540225-6e2d-4779-aae4-bdb173e51720" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f6540225-6e2d-4779-aae4-bdb173e51720_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_f6540225-6e2d-4779-aae4-bdb173e51720" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f6540225-6e2d-4779-aae4-bdb173e51720_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f547a8e4-3dba-4554-8cdb-a274bf674045" 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_f6540225-6e2d-4779-aae4-bdb173e51720" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f547a8e4-3dba-4554-8cdb-a274bf674045" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_b3976838-c583-42ff-98a0-53d8bf83c248" 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_f547a8e4-3dba-4554-8cdb-a274bf674045" xlink:to="loc_us-gaap_RestrictedStockMember_b3976838-c583-42ff-98a0-53d8bf83c248" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_7b126033-5ed9-4d9a-804d-1a5fd62fca7c" 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_f547a8e4-3dba-4554-8cdb-a274bf674045" xlink:to="loc_us-gaap_PerformanceSharesMember_7b126033-5ed9-4d9a-804d-1a5fd62fca7c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ShareholdersEquityDividendsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#ShareholdersEquityDividendsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ShareholdersEquityDividendsDetails" xlink:type="extended" id="ib9e7bafb426140819da8ef35d12bb889_ShareholdersEquityDividendsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_3f6eccfa-800d-4159-b583-648e78003677" 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_us-gaap_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_3f6eccfa-800d-4159-b583-648e78003677" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_0efb446a-a7f1-4b23-a2ef-55ab7a7584aa" 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_us-gaap_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_0efb446a-a7f1-4b23-a2ef-55ab7a7584aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOwnershipInterestsUnitsIssued_51bef055-0b09-4466-a483-615a41734ea9" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_OtherOwnershipInterestsUnitsIssued_51bef055-0b09-4466-a483-615a41734ea9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OtherOwnershipInterestsAmountIssued_3d6f65d5-78cb-4cf5-baaa-aec3900f2f6f" xlink:href="glpi-20220930.xsd#glpi_OtherOwnershipInterestsAmountIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_glpi_OtherOwnershipInterestsAmountIssued_3d6f65d5-78cb-4cf5-baaa-aec3900f2f6f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_0c6a2c14-a7db-45ba-8cd2-e8e1d8b1e859" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_0c6a2c14-a7db-45ba-8cd2-e8e1d8b1e859" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_e96cf9f9-25d8-4261-8418-fa328c7044b3" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_e96cf9f9-25d8-4261-8418-fa328c7044b3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_27285fcd-762c-42a9-99f8-7151f4550300" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_Dividends_27285fcd-762c-42a9-99f8-7151f4550300" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_a3841133-9026-44b8-89bd-71702b67423b" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_a3841133-9026-44b8-89bd-71702b67423b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_0453a274-ce22-46c5-be89-6534287f38ff" 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_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_0453a274-ce22-46c5-be89-6534287f38ff" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCapitalUnitsTable_467996c0-5f4a-4a88-be13-8f11c6757f76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCapitalUnitsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalUnitLineItems_58ec1c2e-74c1-49ae-a25c-4c1a2b688e48" xlink:to="loc_us-gaap_ScheduleOfCapitalUnitsTable_467996c0-5f4a-4a88-be13-8f11c6757f76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventAxis_1cff8b44-6597-4142-8408-74d3421ac13e" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalUnitsTable_467996c0-5f4a-4a88-be13-8f11c6757f76" xlink:to="loc_glpi_TriggeringEventAxis_1cff8b44-6597-4142-8408-74d3421ac13e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_1cff8b44-6597-4142-8408-74d3421ac13e_default" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_glpi_TriggeringEventAxis_1cff8b44-6597-4142-8408-74d3421ac13e" xlink:to="loc_glpi_TriggeringEventDomain_1cff8b44-6597-4142-8408-74d3421ac13e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TriggeringEventDomain_ff852e49-06c3-408b-8936-b07bdcbf18ec" xlink:href="glpi-20220930.xsd#glpi_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_glpi_TriggeringEventAxis_1cff8b44-6597-4142-8408-74d3421ac13e" xlink:to="loc_glpi_TriggeringEventDomain_ff852e49-06c3-408b-8936-b07bdcbf18ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PALiveMasterLeaseMember_41b92441-3f58-4463-afed-5d861e3dbbf8" xlink:href="glpi-20220930.xsd#glpi_PALiveMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glpi_TriggeringEventDomain_ff852e49-06c3-408b-8936-b07bdcbf18ec" xlink:to="loc_glpi_PALiveMasterLeaseMember_41b92441-3f58-4463-afed-5d861e3dbbf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_91b001a9-3d2b-4361-ad4d-1c4e51f949b8" 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_ScheduleOfCapitalUnitsTable_467996c0-5f4a-4a88-be13-8f11c6757f76" xlink:to="loc_srt_OwnershipAxis_91b001a9-3d2b-4361-ad4d-1c4e51f949b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_91b001a9-3d2b-4361-ad4d-1c4e51f949b8_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_91b001a9-3d2b-4361-ad4d-1c4e51f949b8" xlink:to="loc_srt_OwnershipDomain_91b001a9-3d2b-4361-ad4d-1c4e51f949b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_b2552a6c-6fdb-415e-b6d0-39a102b0edaa" 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_91b001a9-3d2b-4361-ad4d-1c4e51f949b8" xlink:to="loc_srt_OwnershipDomain_b2552a6c-6fdb-415e-b6d0-39a102b0edaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TheCordishCompaniesMember_f6bff6e6-36c4-4860-931f-f7d937ad4b17" xlink:href="glpi-20220930.xsd#glpi_TheCordishCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_b2552a6c-6fdb-415e-b6d0-39a102b0edaa" xlink:to="loc_glpi_TheCordishCompaniesMember_f6bff6e6-36c4-4860-931f-f7d937ad4b17" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/ShareholdersEquityDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#ShareholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/ShareholdersEquityDetails" xlink:type="extended" id="i5553959dcf7e4c558dc3852fb910afd9_ShareholdersEquityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractIndexedToIssuersEquitySettlementAlternativesCashAtFairValue_c75f1102-64fb-4412-aeb6-24580b3e58e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForwardContractIndexedToIssuersEquitySettlementAlternativesCashAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_us-gaap_ForwardContractIndexedToIssuersEquitySettlementAlternativesCashAtFairValue_c75f1102-64fb-4412-aeb6-24580b3e58e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold_d8ed449a-21ba-46c8-bc12-410fdd3f2301" xlink:href="glpi-20220930.xsd#glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonGrossSalesPriceofSharesSold_d8ed449a-21ba-46c8-bc12-410fdd3f2301" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares_121e662d-573d-4741-8ac2-05ef6f2c5ffb" xlink:href="glpi-20220930.xsd#glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_glpi_SaleOfStockSharesAuthorizedtoBeIssuedValueNewShares_121e662d-573d-4741-8ac2-05ef6f2c5ffb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock_7f6f17f4-3a56-4220-a157-0daf00bfb8b5" xlink:href="glpi-20220930.xsd#glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_glpi_SaleOfStockPercentageofCommissiontobePaidonSalePriceofBorrowedSharesofCommonStock_7f6f17f4-3a56-4220-a157-0daf00bfb8b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_ATMProgramofferingcosts_8a56ee6f-6ed4-4964-8ebd-7d33dc990fd4" xlink:href="glpi-20220930.xsd#glpi_ATMProgramofferingcosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_glpi_ATMProgramofferingcosts_8a56ee6f-6ed4-4964-8ebd-7d33dc990fd4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleOfStockAmountRemainingForIssuance_e2e66cc7-35fb-402a-baac-6a941114e577" xlink:href="glpi-20220930.xsd#glpi_SaleOfStockAmountRemainingForIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_glpi_SaleOfStockAmountRemainingForIssuance_e2e66cc7-35fb-402a-baac-6a941114e577" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCapitalUnitsTable_2ec77d73-80f0-4640-a737-e31d34f37022" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCapitalUnitsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalUnitLineItems_99ef76f1-1dcd-4fed-83f6-079487b0517f" xlink:to="loc_us-gaap_ScheduleOfCapitalUnitsTable_2ec77d73-80f0-4640-a737-e31d34f37022" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitsByClassAxis_9a356719-a486-490d-9dc8-8f79a2c33ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitsByClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalUnitsTable_2ec77d73-80f0-4640-a737-e31d34f37022" xlink:to="loc_us-gaap_CapitalUnitsByClassAxis_9a356719-a486-490d-9dc8-8f79a2c33ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitClassDomain_9a356719-a486-490d-9dc8-8f79a2c33ca1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CapitalUnitsByClassAxis_9a356719-a486-490d-9dc8-8f79a2c33ca1" xlink:to="loc_us-gaap_CapitalUnitClassDomain_9a356719-a486-490d-9dc8-8f79a2c33ca1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitClassDomain_78a056f6-fd7f-41fd-bb34-c0040f37d23f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CapitalUnitsByClassAxis_9a356719-a486-490d-9dc8-8f79a2c33ca1" xlink:to="loc_us-gaap_CapitalUnitClassDomain_78a056f6-fd7f-41fd-bb34-c0040f37d23f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_a2675bc9-0647-4eb4-b52e-02686b9fba63" 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_ScheduleOfCapitalUnitsTable_2ec77d73-80f0-4640-a737-e31d34f37022" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_a2675bc9-0647-4eb4-b52e-02686b9fba63" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_a2675bc9-0647-4eb4-b52e-02686b9fba63_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_a2675bc9-0647-4eb4-b52e-02686b9fba63" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_a2675bc9-0647-4eb4-b52e-02686b9fba63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_0c899ce0-af59-44f1-8ef9-d54c8f94ccd6" 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_a2675bc9-0647-4eb4-b52e-02686b9fba63" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_0c899ce0-af59-44f1-8ef9-d54c8f94ccd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_AtTheMarketProgramMember_8eebd8e2-02b5-4e4b-94eb-efb6ae15254d" xlink:href="glpi-20220930.xsd#glpi_AtTheMarketProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_0c899ce0-af59-44f1-8ef9-d54c8f94ccd6" xlink:to="loc_glpi_AtTheMarketProgramMember_8eebd8e2-02b5-4e4b-94eb-efb6ae15254d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#StockBasedCompensationStockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationNarrativeDetails" xlink:type="extended" id="i2aec8f5046fd415fa7c2f8d9d34b374e_StockBasedCompensationStockBasedCompensationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3df9e1cb-92ac-4437-8d0f-259480c2ec94" 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_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_b0e31d21-c960-4862-88e2-fbb15fae4284" 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_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_b0e31d21-c960-4862-88e2-fbb15fae4284" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_ea936c64-1101-45fa-b00f-3e543a3fb623" 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_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_ea936c64-1101-45fa-b00f-3e543a3fb623" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_1e1e119f-0e92-480e-aeb8-416d8da8d7dd" 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_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_1e1e119f-0e92-480e-aeb8-416d8da8d7dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_aabe8de6-c1de-4ddb-8272-27a71084093c" 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_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_aabe8de6-c1de-4ddb-8272-27a71084093c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased_712b2a9c-797b-49f4-9fc2-c6cd85dcf6aa" xlink:href="glpi-20220930.xsd#glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_glpi_PeriodOfAggregateShareholderReturnUponWhichPercentageOfSharesVestingAtEndOfMeasurementPeriodWillBeBased_712b2a9c-797b-49f4-9fc2-c6cd85dcf6aa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured_ef79bec2-7701-4c66-bd35-7f72fdedfb24" xlink:href="glpi-20220930.xsd#glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_glpi_PeriodofMSCIUSREITIndexAgainstwhichAggregateShareholderReturnMeasured_ef79bec2-7701-4c66-bd35-7f72fdedfb24" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofRevenuesFromTripleNetLeases_f586517e-4f06-4510-8b3a-3c91a3763fd4" xlink:href="glpi-20220930.xsd#glpi_SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofRevenuesFromTripleNetLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_glpi_SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofRevenuesFromTripleNetLeases_f586517e-4f06-4510-8b3a-3c91a3763fd4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f755f09f-cfe0-45ff-8d2c-9d3e5f19118a" 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_3df9e1cb-92ac-4437-8d0f-259480c2ec94" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f755f09f-cfe0-45ff-8d2c-9d3e5f19118a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e" 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_f755f09f-cfe0-45ff-8d2c-9d3e5f19118a" xlink:to="loc_us-gaap_VestingAxis_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e_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_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e" xlink:to="loc_us-gaap_VestingDomain_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_5c7370a9-e5c7-4900-895f-708b3bd91dd2" 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_d7a0c61a-9aa7-49f0-8e3d-caa5b10e588e" xlink:to="loc_us-gaap_VestingDomain_5c7370a9-e5c7-4900-895f-708b3bd91dd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_EndOfMeasurementPeriodVestingMember_eed8f61c-176c-44ad-b4d1-984aa22ebe81" xlink:href="glpi-20220930.xsd#glpi_EndOfMeasurementPeriodVestingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5c7370a9-e5c7-4900-895f-708b3bd91dd2" xlink:to="loc_glpi_EndOfMeasurementPeriodVestingMember_eed8f61c-176c-44ad-b4d1-984aa22ebe81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_742d7192-8fd1-46b5-ab5c-662468c5ca49" 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_f755f09f-cfe0-45ff-8d2c-9d3e5f19118a" xlink:to="loc_us-gaap_AwardTypeAxis_742d7192-8fd1-46b5-ab5c-662468c5ca49" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_742d7192-8fd1-46b5-ab5c-662468c5ca49_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_742d7192-8fd1-46b5-ab5c-662468c5ca49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_742d7192-8fd1-46b5-ab5c-662468c5ca49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_74096e57-d88f-4575-b58d-df540d3aab6b" 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_742d7192-8fd1-46b5-ab5c-662468c5ca49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_74096e57-d88f-4575-b58d-df540d3aab6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_d77f17b9-2e48-4be5-8d2e-217758a61dd2" 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_74096e57-d88f-4575-b58d-df540d3aab6b" xlink:to="loc_us-gaap_RestrictedStockMember_d77f17b9-2e48-4be5-8d2e-217758a61dd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_a0d2d9f4-7b57-4d27-8f39-8ae37107bd88" 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_74096e57-d88f-4575-b58d-df540d3aab6b" xlink:to="loc_us-gaap_PerformanceSharesMember_a0d2d9f4-7b57-4d27-8f39-8ae37107bd88" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationRestrictedStockActivityDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#StockBasedCompensationStockBasedCompensationRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationRestrictedStockActivityDetails" xlink:type="extended" id="ic93e0bb4da7f403e8b2cd7fcad5331dd_StockBasedCompensationStockBasedCompensationRestrictedStockActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_81ff5f92-350c-4046-8ee4-63b4609a617c" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_81ff5f92-350c-4046-8ee4-63b4609a617c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_b0b475a7-7666-491c-b02b-36be168094b1" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_b0b475a7-7666-491c-b02b-36be168094b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a67abd9e-2aac-4f85-a7ab-a8addae5cb3c" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a67abd9e-2aac-4f85-a7ab-a8addae5cb3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_3074d246-f5d2-4d3e-bac4-43216a311495" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_3074d246-f5d2-4d3e-bac4-43216a311495" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_d99d1550-0cfd-48b4-a155-721e9b28562a" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d6d325b2-7151-485a-8dc7-b98f3732f986" 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_3698284f-ea37-4ec1-8343-5f9cc6ce4e4a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d6d325b2-7151-485a-8dc7-b98f3732f986" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_94ef96ff-d220-4527-b651-5265fa836dd1" 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_d6d325b2-7151-485a-8dc7-b98f3732f986" xlink:to="loc_us-gaap_AwardTypeAxis_94ef96ff-d220-4527-b651-5265fa836dd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_94ef96ff-d220-4527-b651-5265fa836dd1_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_94ef96ff-d220-4527-b651-5265fa836dd1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_94ef96ff-d220-4527-b651-5265fa836dd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f66c4c0a-a37f-4335-9aa8-f86acb23ad01" 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_94ef96ff-d220-4527-b651-5265fa836dd1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f66c4c0a-a37f-4335-9aa8-f86acb23ad01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_0ef21d91-e814-4f08-8a42-f04bb0dcbe26" 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_f66c4c0a-a37f-4335-9aa8-f86acb23ad01" xlink:to="loc_us-gaap_RestrictedStockMember_0ef21d91-e814-4f08-8a42-f04bb0dcbe26" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationPerformanceBasedAwardsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#StockBasedCompensationStockBasedCompensationPerformanceBasedAwardsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/StockBasedCompensationStockBasedCompensationPerformanceBasedAwardsDetails" xlink:type="extended" id="i96742fb0ab964ebba3a2108f115268e3_StockBasedCompensationStockBasedCompensationPerformanceBasedAwardsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_30b51960-db52-4b39-be26-6be00d589963" 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_ffcfd349-5e42-4d88-a509-13951850ed3b" 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_30b51960-db52-4b39-be26-6be00d589963" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_ffcfd349-5e42-4d88-a509-13951850ed3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_469f262a-59a5-41dd-b193-41a5e0122635" 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_ffcfd349-5e42-4d88-a509-13951850ed3b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_469f262a-59a5-41dd-b193-41a5e0122635" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_7d5ab7c5-24f1-4c51-bfdf-301508353e81" 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_ffcfd349-5e42-4d88-a509-13951850ed3b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_7d5ab7c5-24f1-4c51-bfdf-301508353e81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_5bb70d16-40a7-4b63-ba16-1936703dde83" 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_ffcfd349-5e42-4d88-a509-13951850ed3b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_5bb70d16-40a7-4b63-ba16-1936703dde83" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_58433c2c-e214-4bd9-a0a7-7ce2711d51a6" 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_ffcfd349-5e42-4d88-a509-13951850ed3b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_58433c2c-e214-4bd9-a0a7-7ce2711d51a6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_86381604-8761-492c-8580-3a8ee660621d" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bc1c52b7-7c82-463d-b904-bc17aed5ddbb" 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_30b51960-db52-4b39-be26-6be00d589963" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bc1c52b7-7c82-463d-b904-bc17aed5ddbb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_a2e7edb5-4282-45c7-a66f-528839035e1f" 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_bc1c52b7-7c82-463d-b904-bc17aed5ddbb" xlink:to="loc_us-gaap_AwardTypeAxis_a2e7edb5-4282-45c7-a66f-528839035e1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a2e7edb5-4282-45c7-a66f-528839035e1f_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_a2e7edb5-4282-45c7-a66f-528839035e1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a2e7edb5-4282-45c7-a66f-528839035e1f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f616c47b-2339-4a88-8569-931aa863174c" 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_a2e7edb5-4282-45c7-a66f-528839035e1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f616c47b-2339-4a88-8569-931aa863174c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_cdeffcb6-3edb-4dca-8acb-2ba3a1c01e86" 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_f616c47b-2339-4a88-8569-931aa863174c" xlink:to="loc_us-gaap_PerformanceSharesMember_cdeffcb6-3edb-4dca-8acb-2ba3a1c01e86" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/AcquisitionsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#AcquisitionsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/AcquisitionsDetails" xlink:type="extended" id="i39f236b1724e457693fbd8166ba96cac_AcquisitionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" 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_PaymentsToAcquireProductiveAssets_ca83bb97-294e-47e1-88b9-f4d4839ca377" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_ca83bb97-294e-47e1-88b9-f4d4839ca377" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_22af67b2-7b8e-4c8f-b43f-6c777d91410c" xlink:href="glpi-20220930.xsd#glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_glpi_PaymentstoAcquireRealEstateExcludingTransactionCosts_22af67b2-7b8e-4c8f-b43f-6c777d91410c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_SaleLeasebackTransactionTerm_8980f9bb-2b13-4b03-8df2-828dc1aa345b" xlink:href="glpi-20220930.xsd#glpi_SaleLeasebackTransactionTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_glpi_SaleLeasebackTransactionTerm_8980f9bb-2b13-4b03-8df2-828dc1aa345b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_bdd71b89-2463-407e-a67a-4b5b887c6438" 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_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_bdd71b89-2463-407e-a67a-4b5b887c6438" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_aece1a18-a48e-444a-beba-67e697fe780c" 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_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_aece1a18-a48e-444a-beba-67e697fe780c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_3b9a424c-01aa-4f51-abed-4322d8e06ccd" 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_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_3b9a424c-01aa-4f51-abed-4322d8e06ccd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_b20404f5-0eba-422d-b5df-c378255c2d8f" 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_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand_b20404f5-0eba-422d-b5df-c378255c2d8f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_9f8ec66e-e744-4fa4-bf91-ec2690c99186" 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_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings_9f8ec66e-e744-4fa4-bf91-ec2690c99186" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_bc6f24b6-73d6-4354-a866-358e7cb9b22b" 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_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_bc6f24b6-73d6-4354-a866-358e7cb9b22b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_17e7bf72-d5f0-409d-aebf-2f49b1870fec" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_17e7bf72-d5f0-409d-aebf-2f49b1870fec" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_555342d6-8c24-4a4b-8e85-99b00693ffc4" 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_3d6b8f90-1776-49c0-892e-91d9204542c5" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_555342d6-8c24-4a4b-8e85-99b00693ffc4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_dbef7fbe-8b7c-4365-8254-745bb754c8a3" 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_LesseeLeaseDescriptionTable_555342d6-8c24-4a4b-8e85-99b00693ffc4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_dbef7fbe-8b7c-4365-8254-745bb754c8a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_dbef7fbe-8b7c-4365-8254-745bb754c8a3_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_dbef7fbe-8b7c-4365-8254-745bb754c8a3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_dbef7fbe-8b7c-4365-8254-745bb754c8a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" 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_dbef7fbe-8b7c-4365-8254-745bb754c8a3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TwinRiverWorldwideHoldingsIncMember_6620b2f4-08c1-4e3f-bb25-28f36123eb7d" xlink:href="glpi-20220930.xsd#glpi_TwinRiverWorldwideHoldingsIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_TwinRiverWorldwideHoldingsIncMember_6620b2f4-08c1-4e3f-bb25-28f36123eb7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennsylvaniaLiveMember_203b7d76-5dd6-4198-9b93-5e091079916d" xlink:href="glpi-20220930.xsd#glpi_PennsylvaniaLiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_PennsylvaniaLiveMember_203b7d76-5dd6-4198-9b93-5e091079916d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_9a4376c1-841d-4db8-8307-4bff4d2d8112" xlink:href="glpi-20220930.xsd#glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_QuadCitiesCasinoHotelBlackHawkCasinosMember_9a4376c1-841d-4db8-8307-4bff4d2d8112" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_35ef93d0-1251-472f-84e9-8ca95dc4e297" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_TropicanaLasVegasMember_35ef93d0-1251-472f-84e9-8ca95dc4e297" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTivertonCasinoHotelBallysTwinRiverLincolnMember_3ee887e6-68f4-442c-9682-6b12704ee523" xlink:href="glpi-20220930.xsd#glpi_BallysTivertonCasinoHotelBallysTwinRiverLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_BallysTivertonCasinoHotelBallysTwinRiverLincolnMember_3ee887e6-68f4-442c-9682-6b12704ee523" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_8b6094d7-4c73-4b85-8358-f6b8dee4a890" xlink:href="glpi-20220930.xsd#glpi_BallysTivertonCasinoHardrockBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_BallysTivertonCasinoHardrockBiloxiMember_8b6094d7-4c73-4b85-8358-f6b8dee4a890" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysLincolnMember_5da7096b-7eb2-4055-b6ab-68cc9e287b3f" xlink:href="glpi-20220930.xsd#glpi_BallysLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a881d70c-38bc-4c87-8172-e1f30d015d84" xlink:to="loc_glpi_BallysLincolnMember_5da7096b-7eb2-4055-b6ab-68cc9e287b3f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_d192d692-6541-46e4-a7a6-58da715491e0" 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_555342d6-8c24-4a4b-8e85-99b00693ffc4" xlink:to="loc_us-gaap_LeaseContractualTermAxis_d192d692-6541-46e4-a7a6-58da715491e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_d192d692-6541-46e4-a7a6-58da715491e0_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_d192d692-6541-46e4-a7a6-58da715491e0" xlink:to="loc_us-gaap_LeaseContractualTermDomain_d192d692-6541-46e4-a7a6-58da715491e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" 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_d192d692-6541-46e4-a7a6-58da715491e0" xlink:to="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoMarylandLeaseMember_b098dec5-df3f-42fe-af55-5d55453a4c79" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoMarylandLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_LiveCasinoMarylandLeaseMember_b098dec5-df3f-42fe-af55-5d55453a4c79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LiveCasinoPAMasterLeaseMember_f760d8f1-b80b-4ab1-b4ce-e319301871b3" xlink:href="glpi-20220930.xsd#glpi_LiveCasinoPAMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_LiveCasinoPAMasterLeaseMember_f760d8f1-b80b-4ab1-b4ce-e319301871b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_TropicanaLasVegasMember_3336173a-45f7-4a0b-bb70-506c9699775e" xlink:href="glpi-20220930.xsd#glpi_TropicanaLasVegasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_TropicanaLasVegasMember_3336173a-45f7-4a0b-bb70-506c9699775e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonLincolnMember_5433c359-bb0f-46d5-a1f4-c5555a1b2f18" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseTivertonLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_BallysMasterLeaseTivertonLincolnMember_5433c359-bb0f-46d5-a1f4-c5555a1b2f18" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_6ff27a52-0951-424c-99bb-4f14bd5ffd8f" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseTivertonBiloxiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_BallysMasterLeaseTivertonBiloxiMember_6ff27a52-0951-424c-99bb-4f14bd5ffd8f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_BallysMasterLeaseLincolnMember_7b6751ea-cb62-4d01-b236-86883932e56c" xlink:href="glpi-20220930.xsd#glpi_BallysMasterLeaseLincolnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_41d1ac7b-b274-42b7-a28d-d0f55861de97" xlink:to="loc_glpi_BallysMasterLeaseLincolnMember_7b6751ea-cb62-4d01-b236-86883932e56c" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.glpropinc.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="glpi-20220930.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://www.glpropinc.com/role/SubsequentEventsDetails" xlink:type="extended" id="i5a7b08180b6c4d57be7e805328ea0db0_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_edd9b9be-f586-42e9-b757-9bce92bb7dc5" 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_us-gaap_LessorOperatingLeaseRenewalTerm_5a80e0d0-cdb9-4276-82b9-cc481cba0339" 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_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_us-gaap_LessorOperatingLeaseRenewalTerm_5a80e0d0-cdb9-4276-82b9-cc481cba0339" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_62ca1c82-727f-4fc4-ae76-76c6961fc3b1" xlink:href="glpi-20220930.xsd#glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_glpi_LessorLeasingArrangementsOperatingLeasesNumberOfRenewalOptions_62ca1c82-727f-4fc4-ae76-76c6961fc3b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_ffebca85-87b3-41b2-bdeb-a2718a264e48" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_glpi_OperatingLeasesCovenantAnnualRentalEscalationRentIncrease_ffebca85-87b3-41b2-bdeb-a2718a264e48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_9da38e09-1d9e-4415-b788-71ba819f7f00" xlink:href="glpi-20220930.xsd#glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_glpi_OperatingLeasesAmountofRentAvailableUponTriggeringAnnualRentEscalatorReset_9da38e09-1d9e-4415-b788-71ba819f7f00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_OperatingLeaseCashRentReceived_65122e6e-00df-4c08-97fb-e50173c368e2" xlink:href="glpi-20220930.xsd#glpi_OperatingLeaseCashRentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_glpi_OperatingLeaseCashRentReceived_65122e6e-00df-4c08-97fb-e50173c368e2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_cce62e96-b36f-4bd1-b147-2b9c724146a3" 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_edd9b9be-f586-42e9-b757-9bce92bb7dc5" xlink:to="loc_us-gaap_SubsequentEventTable_cce62e96-b36f-4bd1-b147-2b9c724146a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_42f8ddb1-6b94-4318-9e9b-f2f6194ad965" 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_cce62e96-b36f-4bd1-b147-2b9c724146a3" xlink:to="loc_us-gaap_LeaseContractualTermAxis_42f8ddb1-6b94-4318-9e9b-f2f6194ad965" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_42f8ddb1-6b94-4318-9e9b-f2f6194ad965_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_42f8ddb1-6b94-4318-9e9b-f2f6194ad965" xlink:to="loc_us-gaap_LeaseContractualTermDomain_42f8ddb1-6b94-4318-9e9b-f2f6194ad965_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_b5ad1971-93a5-461f-b40d-f50a6e038bb3" 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_42f8ddb1-6b94-4318-9e9b-f2f6194ad965" xlink:to="loc_us-gaap_LeaseContractualTermDomain_b5ad1971-93a5-461f-b40d-f50a6e038bb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PENNEntertainmentNewMasterLeaseMember_305de73f-cb74-4168-9d1f-c1237f8128ce" xlink:href="glpi-20220930.xsd#glpi_PENNEntertainmentNewMasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b5ad1971-93a5-461f-b40d-f50a6e038bb3" xlink:to="loc_glpi_PENNEntertainmentNewMasterLeaseMember_305de73f-cb74-4168-9d1f-c1237f8128ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glpi_PennNationalGamingInc.MasterLeaseMember_d387c8a8-3e3d-4b6f-a118-e91057466606" xlink:href="glpi-20220930.xsd#glpi_PennNationalGamingInc.MasterLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_b5ad1971-93a5-461f-b40d-f50a6e038bb3" xlink:to="loc_glpi_PennNationalGamingInc.MasterLeaseMember_d387c8a8-3e3d-4b6f-a118-e91057466606" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_4305d4fc-26bc-4af4-a89c-c3f62351487e" 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_cce62e96-b36f-4bd1-b147-2b9c724146a3" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_4305d4fc-26bc-4af4-a89c-c3f62351487e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4305d4fc-26bc-4af4-a89c-c3f62351487e_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_4305d4fc-26bc-4af4-a89c-c3f62351487e" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4305d4fc-26bc-4af4-a89c-c3f62351487e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_28aeea65-b7b2-4059-bf13-82b9717d73e5" 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_4305d4fc-26bc-4af4-a89c-c3f62351487e" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_28aeea65-b7b2-4059-bf13-82b9717d73e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_124befea-3274-4f25-92b2-9fbc947c3c49" 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_28aeea65-b7b2-4059-bf13-82b9717d73e5" xlink:to="loc_us-gaap_SubsequentEventMember_124befea-3274-4f25-92b2-9fbc947c3c49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f3604509-d8f8-4738-a77a-1ffdef829da1" 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_cce62e96-b36f-4bd1-b147-2b9c724146a3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f3604509-d8f8-4738-a77a-1ffdef829da1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f3604509-d8f8-4738-a77a-1ffdef829da1_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_f3604509-d8f8-4738-a77a-1ffdef829da1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f3604509-d8f8-4738-a77a-1ffdef829da1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f93a5dd6-0e41-44c9-a37d-d1d307512ff5" 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_f3604509-d8f8-4738-a77a-1ffdef829da1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f93a5dd6-0e41-44c9-a37d-d1d307512ff5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_0146e6b8-45bf-41ab-b49d-2d0f882df99f" 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_f93a5dd6-0e41-44c9-a37d-d1d307512ff5" xlink:to="loc_us-gaap_BuildingMember_0146e6b8-45bf-41ab-b49d-2d0f882df99f" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
