<?xml version="1.0" encoding="US-ASCII" ?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.4b -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
    <!-- Field: Doc-Info; Name: Misc; Value: 96Mps7xRiXgen8uDanwsWaKMubP9z5Z8GekhvWB0bTnq/ywgcOGr2iU5USqmgVYE -->
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:dei="http://xbrl.sec.gov/dei/2026" xmlns:us-gaap="http://fasb.org/us-gaap/2026" xmlns:srt="http://fasb.org/srt/2026" xmlns:srt-types="http://fasb.org/srt-types/2026" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:GCAN="http://gcanrx.com/20260630" elementFormDefault="qualified" targetNamespace="http://gcanrx.com/20260630">
    <annotation>
      <appinfo>
        <link:roleType roleURI="http://gcanrx.com/role/Cover" id="Cover">
          <link:definition>00000001 - Document - Cover</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/BalanceSheets" id="BalanceSheets">
          <link:definition>00000002 - Statement - Consolidated Balance Sheets</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/BalanceSheetsParenthetical" id="BalanceSheetsParenthetical">
          <link:definition>00000003 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/StatementsOfOperations" id="StatementsOfOperations">
          <link:definition>00000004 - Statement - Consolidated Statements of Operations (Unaudited)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/StatementsOfStockholdersDeficiency" id="StatementsOfStockholdersDeficiency">
          <link:definition>00000005 - Statement - Consolidated Statements of Stockholders' Deficiency (Unaudited)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/StatementsOfStockholdersDeficiencyParenthetical" id="StatementsOfStockholdersDeficiencyParenthetical">
          <link:definition>00000006 - Statement - Consolidated Statements of Stockholders' Deficiency (Unaudited) (Parenthetical)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/StatementsOfCashFlows" id="StatementsOfCashFlows">
          <link:definition>00000007 - Statement - Consolidated Statements of Cash Flows (Unaudited)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPolicies" id="NatureOfOperationsAndSummaryOfSignificantAccountingPolicies">
          <link:definition>999008 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/GoingConcern" id="GoingConcern">
          <link:definition>999009 - Disclosure - GOING CONCERN</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/RightOfFirstRefusalAgreement" id="RightOfFirstRefusalAgreement">
          <link:definition>999010 - Disclosure - RIGHT OF FIRST REFUSAL AGREEMENT</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/LoansPayableToRelatedParties" id="LoansPayableToRelatedParties">
          <link:definition>999011 - Disclosure - LOANS PAYABLE TO RELATED PARTIES</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NotesPayableToThirdParties" id="NotesPayableToThirdParties">
          <link:definition>999012 - Disclosure - NOTES PAYABLE TO THIRD PARTIES</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/DerivativeLiability" id="DerivativeLiability">
          <link:definition>999013 - Disclosure - DERIVATIVE LIABILITY</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/CapitalStockAndWarrants" id="CapitalStockAndWarrants">
          <link:definition>999014 - Disclosure - CAPITAL STOCK AND WARRANTS</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/IncomeTaxes" id="IncomeTaxes">
          <link:definition>999015 - Disclosure - INCOME TAXES</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
          <link:definition>999016 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/RestatementOfPreviouslyIssuedFinancialStatements" id="RestatementOfPreviouslyIssuedFinancialStatements">
          <link:definition>999017 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/SubsequentEvents" id="SubsequentEvents">
          <link:definition>999018 - Disclosure - SUBSEQUENT EVENTS</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies" id="NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies">
          <link:definition>999019 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/LoansPayableToRelatedPartiesTables" id="LoansPayableToRelatedPartiesTables">
          <link:definition>999020 - Disclosure - LOANS PAYABLE TO RELATED PARTIES (Tables)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NotesPayableToThirdPartiesTables" id="NotesPayableToThirdPartiesTables">
          <link:definition>999021 - Disclosure - NOTES PAYABLE TO THIRD PARTIES (Tables)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/DerivativeLiabilityTables" id="DerivativeLiabilityTables">
          <link:definition>999022 - Disclosure - DERIVATIVE LIABILITY (Tables)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetailsNarrative" id="NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetailsNarrative">
          <link:definition>999023 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/GoingConcernDetailsNarrative" id="GoingConcernDetailsNarrative">
          <link:definition>999024 - Disclosure - GOING CONCERN (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/RightOfFirstRefusalAgreementDetailsNarrative" id="RightOfFirstRefusalAgreementDetailsNarrative">
          <link:definition>999025 - Disclosure - RIGHT OF FIRST REFUSAL AGREEMENT (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfLoansPayableToRelatedPartiesDetails" id="ScheduleOfLoansPayableToRelatedPartiesDetails">
          <link:definition>999026 - Disclosure - SCHEDULE OF LOANS PAYABLE TO RELATED PARTIES (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfLoansPayableToRelatedPartiesDetailsParenthetical" id="ScheduleOfLoansPayableToRelatedPartiesDetailsParenthetical">
          <link:definition>999027 - Disclosure - SCHEDULE OF LOANS PAYABLE TO RELATED PARTIES (Details) (Parenthetical)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/LoansPayableToRelatedPartiesDetailsNarrative" id="LoansPayableToRelatedPartiesDetailsNarrative">
          <link:definition>999028 - Disclosure - LOANS PAYABLE TO RELATED PARTIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfNotesPayableToThirdPartiesDetails" id="ScheduleOfNotesPayableToThirdPartiesDetails">
          <link:definition>999029 - Disclosure - SCHEDULE OF NOTES PAYABLE TO THIRD PARTIES (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfNotesPayableToThirdPartiesDetailsParenthetical" id="ScheduleOfNotesPayableToThirdPartiesDetailsParenthetical">
          <link:definition>999030 - Disclosure - SCHEDULE OF NOTES PAYABLE TO THIRD PARTIES (Details) (Parenthetical)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfPrepayAmountAndDateDescriptionDetails" id="ScheduleOfPrepayAmountAndDateDescriptionDetails">
          <link:definition>999031 - Disclosure - SCHEDULE OF PREPAY AMOUNT AND DATE DESCRIPTION (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/NotesPayableToThirdPartiesDetailsNarrative" id="NotesPayableToThirdPartiesDetailsNarrative">
          <link:definition>999032 - Disclosure - NOTES PAYABLE TO THIRD PARTIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfDerivativeLiabilityDetails" id="ScheduleOfDerivativeLiabilityDetails">
          <link:definition>999033 - Disclosure - SCHEDULE OF DERIVATIVE LIABILITY (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/ScheduleOfDerivativeLiabilityDetailsParenthetical" id="ScheduleOfDerivativeLiabilityDetailsParenthetical">
          <link:definition>999034 - Disclosure - SCHEDULE OF DERIVATIVE LIABILITY (Details) (Parenthetical)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/DerivativeLiabilityDetailsNarrative" id="DerivativeLiabilityDetailsNarrative">
          <link:definition>999035 - Disclosure - DERIVATIVE LIABILITY (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/CapitalStockAndWarrantsDetailsNarrative" id="CapitalStockAndWarrantsDetailsNarrative">
          <link:definition>999036 - Disclosure - CAPITAL STOCK AND WARRANTS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/CommitmentsAndContingenciesDetailsNarrative" id="CommitmentsAndContingenciesDetailsNarrative">
          <link:definition>999037 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://gcanrx.com/role/RestatementOfPreviouslyIssuedFinancialStatementsDetailsNarrative" id="RestatementOfPreviouslyIssuedFinancialStatementsDetailsNarrative">
          <link:definition>999038 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:linkbaseRef xlink:type="simple" xlink:href="gcan-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="gcan-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="gcan-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="gcan-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
    <import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
    <import namespace="http://fasb.org/us-types/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-types-2026.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd" />
    <import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd" />
    <import namespace="http://fasb.org/srt-types/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-types-2026.xsd" />
    <element id="GCAN_SeriesAConvertiblePreferredStockMember" name="SeriesAConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SeriesBConvertiblePreferredStockMember" name="SeriesBConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ConsultingFeesMember" name="ConsultingFeesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_GreenCCorporationMember" name="GreenCCorporationMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ClassACommonStockMember" name="ClassACommonStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FormerShareHoldersMember" name="FormerShareHoldersMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LicensingAgreementMember" name="LicensingAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_KolTuvVenturesLLCMember" name="KolTuvVenturesLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_RightOfFirstRefusalAgreementMember" name="RightOfFirstRefusalAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_CBDMember" name="CBDMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ElishaKalfaAndYonahKalfaMember" name="ElishaKalfaAndYonahKalfaMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_AitanZacharinMember" name="AitanZacharinMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FernandoBiskerAndSigalushLLCMember" name="FernandoBiskerAndSigalushLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LoanAndContributionAgreementsMember" name="LoanAndContributionAgreementsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_PromissoryNoteMember" name="PromissoryNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ConvertiblePromissoryNoteMember" name="ConvertiblePromissoryNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_JohnT.RootMember" name="JohnT.RootMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FirstFireGlobalOpportunitiesFundLLCMember" name="FirstFireGlobalOpportunitiesFundLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FirstFireNoteMember" name="FirstFireNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FirstFireNoteOneMember" name="FirstFireNoteOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FirstFireNoteTwoMember" name="FirstFireNoteTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SecondFirstFireNoteMember" name="SecondFirstFireNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LessThanOrEqualsToThirtyDaysMember" name="LessThanOrEqualsToThirtyDaysMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FFNoteMember" name="FFNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ThirtyOneToSixtyDaysMember" name="ThirtyOneToSixtyDaysMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SixtyOneToNinetyDaysMember" name="SixtyOneToNinetyDaysMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_NinetyOneToHundredAndTwentyMember" name="NinetyOneToHundredAndTwentyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_OnehundredAndTwentyOneToOneHundredFiftyDaysMember" name="OnehundredAndTwentyOneToOneHundredFiftyDaysMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_OneHundredAndFiftyOneToOneHundredAndEightyMember" name="OneHundredAndFiftyOneToOneHundredAndEightyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_EmetCapitalPartnersLLCMember" name="EmetCapitalPartnersLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SyliosCorpMember" name="SyliosCorpMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_TwoConsultingFirmEntitiesMember" name="TwoConsultingFirmEntitiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_TwoExchangeAgreementMember" name="TwoExchangeAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SecondExchangeAgreementMember" name="SecondExchangeAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ConvertibleNotesMember" name="ConvertibleNotesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_NotesPayableMember" name="NotesPayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_WarrantAMember" name="WarrantAMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_WarrantBMember" name="WarrantBMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_WarrantCMember" name="WarrantCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ExclusiveLicenseAgreementMember" name="ExclusiveLicenseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_PharmedicaLtdMember" name="PharmedicaLtdMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SubLicenseAgreementMember" name="SubLicenseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SymtomaxUnipessoalLdaMember" name="SymtomaxUnipessoalLdaMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ServicesAgreementsMember" name="ServicesAgreementsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_CommonStockSharesIssuedNotDisclosed" name="CommonStockSharesIssuedNotDisclosed" nillable="true" xbrli:periodType="duration" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_GainOnCancellationOfDebt" name="GainOnCancellationOfDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_GainOnCancellationOfPreferredStock" name="GainOnCancellationOfPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_NoteDefaultPenaltiesAndInterest" name="NoteDefaultPenaltiesAndInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_IssuanceOfCommonStockForAccruedCompensation" name="IssuanceOfCommonStockForAccruedCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_DisclosureRestatementOfPreviouslyIssuedFinancialStatementsAbstract" name="DisclosureRestatementOfPreviouslyIssuedFinancialStatementsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_RestatementOfPreviouslyIssuedFinancialStatementsTextBlock" name="RestatementOfPreviouslyIssuedFinancialStatementsTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_NatureOfOperationsPolicyTextBlock" name="NatureOfOperationsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_InterimFinancialStatementsPolicyTextBlock" name="InterimFinancialStatementsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_RelatedPartiesPolicyTextBlock" name="RelatedPartiesPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LicensingFee" name="LicensingFee" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_IncreaseDecreaseInLicensingFee" name="IncreaseDecreaseInLicensingFee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_MilestonePayments" name="MilestonePayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_MilestonePaymentsOnInitiationOfClinicalTrial" name="MilestonePaymentsOnInitiationOfClinicalTrial" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_MilestonePaymentsOnFirstRegulatoryApproval" name="MilestonePaymentsOnFirstRegulatoryApproval" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_RoyaltyPaymentDescription" name="RoyaltyPaymentDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SublicenseRoyaltyPercentage" name="SublicenseRoyaltyPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_WorkingCapitalDeficit" name="WorkingCapitalDeficit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_DebtRepaymentPercentage" name="DebtRepaymentPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_DerivativeLiabilityAbstract" name="DerivativeLiabilityAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_DerivativeLiabilityTable" name="DerivativeLiabilityTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="GCAN_DerivativeLiabilityFairValueAssumptionsExpectedTerm" name="DerivativeLiabilityFairValueAssumptionsExpectedTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_StockIssuedDuringPeriodValueOfUnpaidCompensation" name="StockIssuedDuringPeriodValueOfUnpaidCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_CommonStockSharesHeld" name="CommonStockSharesHeld" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ExcessOfCommonStockValue" name="ExcessOfCommonStockValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FairValueOfCommonStock" name="FairValueOfCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LossOnConversionOfNotePayableAndAccruedInterestToCommonStock" name="LossOnConversionOfNotePayableAndAccruedInterestToCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_WarrantIssued" name="WarrantIssued" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_FairValueOfSharesChargedToOtherOperatingExpenses" name="FairValueOfSharesChargedToOtherOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_SharesChargedToOtherOperatingExpenses" name="SharesChargedToOtherOperatingExpenses" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ExcessOfFairValue" name="ExcessOfFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_LiabilityReduction" name="LiabilityReduction" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_StockIssuedDuringPeriodSharesIssuanceOfCommonStockForCompensationShares" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockForCompensationShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_AccruedCompensationParValue" name="AccruedCompensationParValue" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_StockIssuedDuringPeriodValueIssuanceOfCommonStockForCompensationShares" name="StockIssuedDuringPeriodValueIssuanceOfCommonStockForCompensationShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_AnnualRoyaltiesRate" name="AnnualRoyaltiesRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCAN_ForgivenessOfRoyaltyPayable" name="ForgivenessOfRoyaltyPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
