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+<path d="M42.635 34.7091C41.8679 34.7386 41.7937 35.4402 41.7849 35.5778V37.6479H44.6661C44.9089 38.0019 45.1505 38.3524 45.3752 38.6783L45.6306 39.0488C45.955 39.5121 46.2664 39.9494 46.3958 40.1168C46.4046 40.1284 46.4149 40.1429 46.4269 40.1598C46.5904 40.3898 47.0831 41.0827 48.7845 41.4971C49.4069 41.6479 50.0927 41.6928 50.4763 41.7179C50.5458 41.7224 50.6058 41.7263 50.6533 41.7301L50.824 41.7385L50.8058 41.7056C50.8058 41.7056 50.4976 41.2817 50.1082 40.6134L50.0234 40.4677C49.4873 39.5466 47.6691 36.4226 47.3201 35.8127C47.0057 35.2628 46.5051 35.018 45.9929 34.8693H45.9879C45.6209 34.7681 45.218 34.7294 44.9164 34.7141C44.903 34.7135 44.89 34.7127 44.877 34.7119C44.8542 34.7105 44.8316 34.7091 44.8082 34.7091H42.635Z" fill="white"/>
+<defs>
+<filter id="filter0_f" x="0" y="0" width="210" height="256" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feBlend mode="normal" in="SourceGraphic" in2="BackgroundImageFix" result="shape"/>
+<feGaussianBlur stdDeviation="9" result="effect1_foregroundBlur"/>
+</filter>
+</defs>
+</svg>
diff --git a/src/components/Connection/ModalGRDF.scss b/src/components/Connection/ModalGRDF.scss
new file mode 100644
index 0000000000000000000000000000000000000000..8ff74359e776278107d534f88a37da0ac584013d
--- /dev/null
+++ b/src/components/Connection/ModalGRDF.scss
@@ -0,0 +1,20 @@
+@import 'src/styles/base/color';
+
+.grdfAuthModal {
+  padding: 0 1.5rem;
+  p {
+    color: white;
+  }
+  .yellowText {
+    color: $gold-shadow;
+  }
+  .button-ok {
+    width: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: space-evenly;
+    margin: 1.5rem auto;
+    padding: 1rem 2rem;
+    transition: all 300ms ease;
+  }
+}
diff --git a/src/components/Connection/ModalGRDF.tsx b/src/components/Connection/ModalGRDF.tsx
new file mode 100644
index 0000000000000000000000000000000000000000..15f722e015b647b021dc6a0ac096ab8a56f09bed
--- /dev/null
+++ b/src/components/Connection/ModalGRDF.tsx
@@ -0,0 +1,78 @@
+import React, { useEffect } from 'react'
+import { useI18n } from 'cozy-ui/transpiled/react/I18n'
+
+import Modal from 'components/CommonKit/Modal/Modal'
+import StyledButton from 'components/CommonKit/Button/StyledButton'
+import switchMobile from 'assets/icons/ico/switchGRDFMobile.svg'
+import switchDesktop from 'assets/icons/ico/switchGRDFDesktop.svg'
+
+import './ModalGRDF.scss'
+import { ScreenType } from 'enum/screen.enum'
+import StyledIcon from 'components/CommonKit/Icon/StyledIcon'
+import StyledBlackSpinner from 'components/CommonKit/Spinner/StyledBlackSpinner'
+import { useSelector } from 'react-redux'
+import { EcolyoState } from 'store'
+
+interface ModalGRDFProps {
+  open: boolean
+  isWaiting?: boolean
+  status: string
+  handleCloseClick: () => void
+  handleSubmit: () => void
+}
+
+const ModalGRDF: React.FC<ModalGRDFProps> = ({
+  open,
+  handleCloseClick,
+  handleSubmit,
+  isWaiting,
+  status,
+}: ModalGRDFProps) => {
+  const { t } = useI18n()
+  const { screenType } = useSelector((state: EcolyoState) => state.global)
+
+  useEffect(() => {
+    status && status === 'idle' && handleCloseClick
+  }, [status])
+  return (
+    <>
+      <Modal open={open} handleCloseClick={handleCloseClick}>
+        {screenType === ScreenType.MOBILE ? (
+          <StyledIcon icon={switchMobile} size={200} />
+        ) : (
+          <StyledIcon icon={switchDesktop} size={300} />
+        )}
+        <div className="grdfAuthModal">
+          <p className="text-16-normal">
+            {t('auth.grdfgrandlyon.authModal.text1')}
+            <span className="text-16-bold yellowText">
+              {t('auth.grdfgrandlyon.authModal.text2')}
+            </span>
+          </p>
+          <p className="text-16-normal">
+            {t('auth.grdfgrandlyon.authModal.listItem1')}
+            <br />
+            {t('auth.grdfgrandlyon.authModal.listItem2')}
+          </p>
+          <p className="text-16-normal">
+            {t('auth.grdfgrandlyon.authModal.endText1')}
+            <span className="text-16-bold yellowText">
+              {t('auth.grdfgrandlyon.authModal.duration')}
+            </span>
+            {t('auth.grdfgrandlyon.authModal.endText2')}
+          </p>
+          <StyledButton
+            className="button-ok"
+            onClick={handleSubmit}
+            disabled={isWaiting}
+          >
+            {t('auth.grdfgrandlyon.authModal.buttonText')}
+            {isWaiting && <StyledBlackSpinner size={30} />}
+          </StyledButton>
+        </div>
+      </Modal>
+    </>
+  )
+}
+
+export default ModalGRDF
diff --git a/src/components/Connection/OAuthForm.tsx b/src/components/Connection/OAuthForm.tsx
index 29643099a035586e14dd09a8488508e2de9e9160..252f08b711621538fced7e818129dcbdd312207b 100644
--- a/src/components/Connection/OAuthForm.tsx
+++ b/src/components/Connection/OAuthForm.tsx
@@ -13,6 +13,7 @@ import iconEglLogo from 'assets/icons/visu/egl-logo.svg'
 import StyledAuthButton from 'components/CommonKit/Button/StyledAuthButton'
 import StyledIcon from 'components/CommonKit/Icon/StyledIcon'
 import StyledBlackSpinner from 'components/CommonKit/Spinner/StyledBlackSpinner'
+import ModalGRDF from './ModalGRDF'
 
 interface OAuthFormProps {
   konnector: Konnector
@@ -29,6 +30,11 @@ const OAuthForm: React.FC<OAuthFormProps> = ({
   const { t } = useI18n()
   const client = useClient()
   const [status, setStatus] = useState<string>(IDLE)
+  const [openGRDFModal, setOpenGRDFModal] = useState<boolean>(false)
+
+  const toggleGRDFModal = useCallback(() => {
+    setOpenGRDFModal(prev => !prev)
+  }, [openGRDFModal])
 
   const endOAuth = () => {
     setStatus(IDLE)
@@ -65,7 +71,11 @@ const OAuthForm: React.FC<OAuthFormProps> = ({
       <StyledAuthButton
         type="button"
         color="primary"
-        onClick={handleSubmit}
+        onClick={
+          konnector.slug === fluidconfig[FluidType.GAS].konnectorConfig.slug
+            ? toggleGRDFModal
+            : handleSubmit
+        }
         disabled={isWaiting}
       >
         <div className="authform-button-content">
@@ -92,6 +102,15 @@ const OAuthForm: React.FC<OAuthFormProps> = ({
           t={t}
         />
       )}
+      {openGRDFModal && (
+        <ModalGRDF
+          open={openGRDFModal}
+          handleCloseClick={toggleGRDFModal}
+          handleSubmit={handleSubmit}
+          isWaiting={isWaiting}
+          status={status}
+        />
+      )}
     </>
   )
 }
diff --git a/src/locales/fr.json b/src/locales/fr.json
index 87b80927deb33ba215470002dfb0676f0a67e29c..700f73a1e17c8e299e2d759ca86ec13bc6ccb37b 100644
--- a/src/locales/fr.json
+++ b/src/locales/fr.json
@@ -265,7 +265,17 @@
         "title": "Pas de compte GRDF ?",
         "text": "Vous pouvez le créer en vous munissant d'une facture de gaz."
       },
-      "create_account": "Je crée mon compte GRDF"
+      "create_account": "Je crée mon compte GRDF",
+      "authModal": {
+        "text1": "La visualisation de vos données sur Ecolyo demande",
+        "text2": " l’activation de tous les paramètres à l’exception de :",
+        "listItem1": "- mes données publiées",
+        "listItem2": "- mes données contractuelles",
+        "endText1": "Une période de consentement de ",
+        "duration": "1 an ",
+        "endText2": "minimum est demandée pour une expérience optimale.",
+        "buttonText": "J'ai compris"
+      }
     },
     "eglgrandlyon": {
       "connect": {
@@ -347,16 +357,16 @@
       }
     },
     "card_done": {
-      "day" : " jour",
-      "days" : " jours",
-      "saving" : "Economie de",
-      "depense" : "Dépense de",
-      "win" : "Gagné",
-      "almostWin" : "Presque gagné",
-      "lost" : "Perdu",
-      "stars" : " étoiles",
-      "get_in" : "obtenues en ",
-      "final_defi" : "sur le défi final"
+      "day": " jour",
+      "days": " jours",
+      "saving": "Economie de",
+      "depense": "Dépense de",
+      "win": "Gagné",
+      "almostWin": "Presque gagné",
+      "lost": "Perdu",
+      "stars": " étoiles",
+      "get_in": "obtenues en ",
+      "final_defi": "sur le défi final"
     }
   },
   "duel": {