content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0002006102</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001780232</issuerCik>
        <issuerName>GFL Environmental Inc.</issuerName>
        <secFileNumber>001-39240</secFileNumber>
        <issuerAddress>
          <com:street1>100 New Park Place, Suite 500</com:street1>
          <com:city>Vaughan, Ontario</com:city>
          <com:stateOrCountry>A6</com:stateOrCountry>
          <com:zipCode>L4K 0H9</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>905-326-0101</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gregory Gerald Yorston</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Affiliate</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Subordinate Voting Shares</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue - 6th Floor</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>28794</noOfUnitsSold>
        <aggregateMarketValue>1017579.96</aggregateMarketValue>
        <noOfUnitsOutstanding>359349904</noOfUnitsOutstanding>
        <approxSaleDate>03/25/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Subordinate Voting Shares</securitiesClassTitle>
        <acquiredDate>03/22/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Vested Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Greg Yorston, who acquired the shares from the issuer on 3/11/24</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>28794</amountOfSecuritiesAcquired>
        <paymentDate>03/11/2024</paymentDate>
        <natureOfPayment>Transfer</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Gregory G. Yorston Trust U/A/D 01/28/17</name>
          <address>
            <com:street1>Care of GFL Environmental, Inc</com:street1>
            <com:street2>100 New Park Place, Suite 500</com:street2>
            <com:city>Vaughan, Ontario, Canada</com:city>
            <com:stateOrCountry>A6</com:stateOrCountry>
            <com:zipCode>L4K 0H9</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Subordinate Voting Shares</securitiesClassTitle>
        <saleDate>12/28/2023</saleDate>
        <amountOfSecuritiesSold>66410</amountOfSecuritiesSold>
        <grossProceeds>2288130.12</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>The shares filed today will be sold by the Gregory Gerald Yorston Trust UAD 01/28/2017, Gregory Gerald Yorston as Trustee</remarks>
      <noticeSignature>
        <noticeDate>03/25/2024</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Gregory Gerald Yorston</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3831}]
text: 144
  0002006102
  XXXXXXXX
  LIVE
  0001780232
  GFL Environmental Inc.
  001-39240
  100 New Park Place, Suite 500
  Vaughan, Ontario
  A6
  L4K 0H9
  905-326-0101
  Gregory Gerald Yorston
  Affiliate
  Subordinate Voting Shares
  J.P. Morgan Securities LLC
  390 Madison Avenue - 6th Floor
  New York
  NY
  10017
  28794
  1017579.96
  359349904
  03/25/2024
  NYSE
  Subordinate Voting Shares
  03/22/2024
  Vested Restricted Stock Units
  Greg Yorston, who acquired the shares from the issuer on 3/11/24
  N
  28794
  03/11/2024
  Transfer
  N
  Gregory G. Yorston Trust U/A/D 01/28/17
  Care of GFL Environmental, Inc
  100 New Park Place, Suite 500
  Vaughan, Ontario, Canada
  A6
  L4K 0H9
  Subordinate Voting Shares
  12/28/2023
  66410
  2288130.12
  The shares filed today will be sold by the Gregory Gerald Yorston Trust UAD 01/28/2017, Gregory Gerald Yorston as Trustee
  03/25/2024
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Gregory Gerald Yorston