diff --git a/modules/smartadserverBidAdapter.js b/modules/smartadserverBidAdapter.js
index fd2d6e16463..4b7e65cae87 100644
--- a/modules/smartadserverBidAdapter.js
+++ b/modules/smartadserverBidAdapter.js
@@ -159,6 +159,11 @@ export const spec = {
         sdc: sellerDefinedContext
       };
 
+      const gpid = deepAccess(bid, 'ortb2Imp.ext.gpid', deepAccess(bid, 'ortb2Imp.ext.data.pbadslot', ''));
+      if (gpid) {
+        payload.gpid = gpid;
+      }
+
       if (bidderRequest) {
         if (bidderRequest.gdprConsent) {
           payload.addtl_consent = bidderRequest.gdprConsent.addtlConsent;
diff --git a/test/spec/modules/smartadserverBidAdapter_spec.js b/test/spec/modules/smartadserverBidAdapter_spec.js
index 504ff978e9e..9142b730b27 100644
--- a/test/spec/modules/smartadserverBidAdapter_spec.js
+++ b/test/spec/modules/smartadserverBidAdapter_spec.js
@@ -1,6 +1,7 @@
 import { expect } from 'chai';
 import { BANNER, VIDEO } from 'src/mediaTypes.js';
 import { config } from 'src/config.js';
+import { deepClone } from 'src/utils.js';
 import { spec } from 'modules/smartadserverBidAdapter.js';
 
 // Default params with optional ones
@@ -1339,4 +1340,45 @@ describe('Smart bid adapter tests', function () {
       expect(bannerRequest).to.have.property('formatid').and.to.equal('90');
     });
   });
+
+  describe('Global Placement ID (GPID)', function () {
+    it('should not include gpid by default', () => {
+      const request = spec.buildRequests(DEFAULT_PARAMS_WO_OPTIONAL);
+      const requestContent = JSON.parse(request[0].data);
+
+      expect(requestContent).to.not.have.property('gdid');
+    });
+
+    it('should include gpid if pbadslot in ortb2Imp', () => {
+      const gpid = '/19968336/header-bid-tag-1';
+      const bidRequests = deepClone(DEFAULT_PARAMS_WO_OPTIONAL);
+
+      bidRequests[0].ortb2Imp = {
+        ext: {
+          data: {
+            pbadslot: gpid
+          }
+        }
+      };
+
+      const request = spec.buildRequests(bidRequests);
+      const requestContent = JSON.parse(request[0].data);
+
+      expect(requestContent).to.have.property('gpid').and.to.equal(gpid);
+    });
+
+    it('should include gpid if imp[].ext.gpid exists', () => {
+      const gpid = '/1111/homepage#div-leftnav';
+      const bidRequests = deepClone(DEFAULT_PARAMS_WO_OPTIONAL);
+
+      bidRequests[0].ortb2Imp = {
+        ext: { gpid }
+      };
+
+      const request = spec.buildRequests(bidRequests);
+      const requestContent = JSON.parse(request[0].data);
+
+      expect(requestContent).to.have.property('gpid').and.to.equal(gpid);
+    });
+  });
 });