diff --git a/modules/ixBidAdapter.js b/modules/ixBidAdapter.js
index 136cf6f25f0..7d3b3a33a7d 100644
--- a/modules/ixBidAdapter.js
+++ b/modules/ixBidAdapter.js
@@ -1053,9 +1053,14 @@ function buildRequest(validBidRequests, bidderRequest, impressions, version) {
       currentImpressionSize = encodeURIComponent(JSON.stringify({ impressionObjects })).length;
     }
 
-    const gpid = impressions[transactionIds[adUnitIndex]].gpid;
+    let gpid = impressions[transactionIds[adUnitIndex]].gpid;
     const dfpAdUnitCode = impressions[transactionIds[adUnitIndex]].dfp_ad_unit_code;
-    const tid = impressions[transactionIds[adUnitIndex]].tid
+    const tid = impressions[transactionIds[adUnitIndex]].tid;
+    const divId = impressions[transactionIds[adUnitIndex]].divId;
+
+    if (!gpid && dfpAdUnitCode && divId) {
+      gpid = `${dfpAdUnitCode}#${divId}`
+    }
     if (impressionObjects.length && BANNER in impressionObjects[0]) {
       const { id, banner: { topframe } } = impressionObjects[0];
       const _bannerImpression = {
@@ -1135,7 +1140,6 @@ function buildRequest(validBidRequests, bidderRequest, impressions, version) {
     const pbaAdSlot = impressions[transactionIds[adUnitIndex]].pbadslot
     const tagId = impressions[transactionIds[adUnitIndex]].tagId
     const adUnitCode = impressions[transactionIds[adUnitIndex]].adUnitCode
-    const divId = impressions[transactionIds[adUnitIndex]].divId
     if (pbaAdSlot || tagId || adUnitCode || divId) {
       const clonedRObject = deepClone(r);
       const requestSize = `${baseUrl}${parseQueryStringParameters({ ...payload, r: JSON.stringify(clonedRObject) })}`.length;
@@ -1279,7 +1283,8 @@ function createNativeImps(validBidRequest, nativeImps) {
     nativeImps[validBidRequest.transactionId] = {};
     nativeImps[validBidRequest.transactionId].ixImps = [];
     nativeImps[validBidRequest.transactionId].ixImps.push(imp);
-    nativeImps[validBidRequest.transactionId].gpid = deepAccess(validBidRequest, 'ortb2Imp.ext.gpid')
+    nativeImps[validBidRequest.transactionId].gpid = deepAccess(validBidRequest, 'ortb2Imp.ext.gpid');
+    nativeImps[validBidRequest.transactionId].dfp_ad_unit_code = deepAccess(validBidRequest, 'ortb2Imp.ext.data.adserver.adslot');
     nativeImps[validBidRequest.transactionId].pbadslot = deepAccess(validBidRequest, 'ortb2Imp.ext.data.pbadslot');
     nativeImps[validBidRequest.transactionId].tagId = deepAccess(validBidRequest, 'params.tagId');
 
@@ -1302,6 +1307,7 @@ function createVideoImps(validBidRequest, videoImps) {
     videoImps[validBidRequest.transactionId].ixImps = [];
     videoImps[validBidRequest.transactionId].ixImps.push(imp);
     videoImps[validBidRequest.transactionId].gpid = deepAccess(validBidRequest, 'ortb2Imp.ext.gpid');
+    videoImps[validBidRequest.transactionId].dfp_ad_unit_code = deepAccess(validBidRequest, 'ortb2Imp.ext.data.adserver.adslot');
     videoImps[validBidRequest.transactionId].pbadslot = deepAccess(validBidRequest, 'ortb2Imp.ext.data.pbadslot');
     videoImps[validBidRequest.transactionId].tagId = deepAccess(validBidRequest, 'params.tagId');
 
@@ -1651,7 +1657,17 @@ export const spec = {
     }
 
     if (mediaTypeVideoRef && paramsVideoRef) {
+      const videoImp = bidToVideoImp(bid).video;
       const errorList = checkVideoParams(mediaTypeVideoRef, paramsVideoRef);
+      if (deepAccess(bid, 'mediaTypes.video.context') === OUTSTREAM && isIndexRendererPreferred(bid) && videoImp) {
+        const outstreamPlayerSize = [deepAccess(videoImp, 'w'), deepAccess(videoImp, 'h')];
+        const isValidSize = outstreamPlayerSize[0] >= OUTSTREAM_MINIMUM_PLAYER_SIZE[0] && outstreamPlayerSize[1] >= OUTSTREAM_MINIMUM_PLAYER_SIZE[1];
+        if (!isValidSize) {
+          logError(`IX Bid Adapter: ${outstreamPlayerSize} is an invalid size for IX outstream renderer`);
+          return false;
+        }
+      }
+
       if (errorList.length) {
         errorList.forEach((err) => {
           logError(err, { bidder: BIDDER_CODE, code: ERROR_CODES.PROPERTY_NOT_INCLUDED });
@@ -1660,16 +1676,6 @@ export const spec = {
       }
     }
 
-    const videoImp = bidToVideoImp(bid).video;
-    if (deepAccess(bid, 'mediaTypes.video.context') === OUTSTREAM && isIndexRendererPreferred(bid) && videoImp) {
-      const outstreamPlayerSize = [deepAccess(videoImp, 'w'), deepAccess(videoImp, 'h')];
-      const isValidSize = outstreamPlayerSize[0] >= OUTSTREAM_MINIMUM_PLAYER_SIZE[0] && outstreamPlayerSize[1] >= OUTSTREAM_MINIMUM_PLAYER_SIZE[1];
-      if (!isValidSize) {
-        logError(`IX Bid Adapter: ${outstreamPlayerSize} is an invalid size for IX outstream renderer`);
-        return false;
-      }
-    }
-
     return nativeMediaTypeValid(mediaTypeNativeRef);
   },
 
diff --git a/test/spec/modules/ixBidAdapter_spec.js b/test/spec/modules/ixBidAdapter_spec.js
index a25e6b1c6a0..086ec305ccc 100644
--- a/test/spec/modules/ixBidAdapter_spec.js
+++ b/test/spec/modules/ixBidAdapter_spec.js
@@ -1657,6 +1657,70 @@ describe('IndexexchangeAdapter', function () {
       expect(gpid).to.equal(GPID);
     });
 
+    it('should still build gpid in request if ortb2Imp.ext.gpid does not exist', function () {
+      const AD_UNIT_CODE = '/1111/home';
+      const validBids = utils.deepClone(DEFAULT_BANNER_VALID_BID);
+      sinon.stub(utils, 'getGptSlotInfoForAdUnitCode')
+        .returns({ gptSlot: AD_UNIT_CODE, divId: 'adunit-code-3-div-id' });
+      validBids[0].ortb2Imp = {
+        ext: {
+          data: {
+            adserver: {
+              name: 'gam',
+              adslot: AD_UNIT_CODE
+            }
+          }
+        }
+      }
+      const requests = spec.buildRequests(validBids, DEFAULT_OPTION);
+      const { ext: { gpid } } = JSON.parse(requests[0].data.r).imp[0];
+      utils.getGptSlotInfoForAdUnitCode.restore();
+      expect(gpid).to.equal(`${AD_UNIT_CODE}#adunit-code-3-div-id`);
+    });
+
+    it('should not build gpid if divid doesnt exist when ortb2Imp.ext.gpid does not exist', function () {
+      const AD_UNIT_CODE = '/1111/home';
+      const validBids = utils.deepClone(DEFAULT_BANNER_VALID_BID);
+      sinon.stub(utils, 'getGptSlotInfoForAdUnitCode')
+        .returns({ gptSlot: AD_UNIT_CODE });
+      validBids[0].ortb2Imp = {
+        ext: {
+          data: {
+            adserver: {
+              name: 'gam',
+              adslot: AD_UNIT_CODE
+            }
+          }
+        }
+      }
+      const requests = spec.buildRequests(validBids, DEFAULT_OPTION);
+      const imp = JSON.parse(requests[0].data.r).imp[0];
+      utils.getGptSlotInfoForAdUnitCode.restore();
+      expect(imp.ext.gpid).to.be.undefined;
+      expect(imp.ext.dfp_ad_unit_code).to.equal(AD_UNIT_CODE)
+    });
+
+    it('should not build gpid if dfp ad unit code / divid doesnt exist when ortb2Imp.ext.gpid does not exist', function () {
+      const AD_UNIT_CODE = '/1111/home';
+      const validBids = utils.deepClone(DEFAULT_BANNER_VALID_BID);
+      sinon.stub(utils, 'getGptSlotInfoForAdUnitCode')
+        .returns({});
+      validBids[0].ortb2Imp = {
+        ext: {
+          data: {
+            adserver: {
+              name: 'gam',
+            }
+          }
+        }
+      }
+      const requests = spec.buildRequests(validBids, DEFAULT_OPTION);
+
+      const imp = JSON.parse(requests[0].data.r).imp[0];
+      utils.getGptSlotInfoForAdUnitCode.restore();
+      expect(imp.ext).to.be.undefined;
+    });
+
     it('should send gpid in request if ortb2Imp.ext.gpid exists when no size present', function () {
       const validBids = utils.deepClone(DEFAULT_BANNER_VALID_BID_PARAM_NO_SIZE);
       validBids[0].ortb2Imp = {