diff --git a/modules/rtbhouseBidAdapter.js b/modules/rtbhouseBidAdapter.js
index 83536bd0abe..f909f2302f9 100644
--- a/modules/rtbhouseBidAdapter.js
+++ b/modules/rtbhouseBidAdapter.js
@@ -1,4 +1,4 @@
-import {deepAccess, deepClone, isArray, logError, mergeDeep, isEmpty, isPlainObject, isNumber, isStr} from '../src/utils.js';
+import {deepAccess, deepClone, isArray, logError, mergeDeep, isEmpty, isPlainObject, isNumber, isStr, deepSetValue} from '../src/utils.js';
 import {getOrigin} from '../libraries/getOrigin/index.js';
 import {BANNER, NATIVE} from '../src/mediaTypes.js';
 import {registerBidder} from '../src/adapters/bidderFactory.js';
@@ -87,6 +87,14 @@ export const spec = {
       });
     }
 
+    if (bidderRequest.gppConsent?.gppString) {
+      deepSetValue(request, 'regs.gpp', bidderRequest.gppConsent.gppString);
+      deepSetValue(request, 'regs.gpp_sid', bidderRequest.gppConsent.applicableSections);
+    } else if (ortb2Params.regs?.gpp) {
+      deepSetValue(request, 'regs.gpp', ortb2Params.regs.gpp);
+      deepSetValue(request, 'regs.gpp_sid', ortb2Params.regs.gpp_sid);
+    }
+
     const computedEndpointUrl = ENDPOINT_URL;
 
     return {
diff --git a/test/spec/modules/rtbhouseBidAdapter_spec.js b/test/spec/modules/rtbhouseBidAdapter_spec.js
index 2f1fa127b28..f44ccd1651d 100644
--- a/test/spec/modules/rtbhouseBidAdapter_spec.js
+++ b/test/spec/modules/rtbhouseBidAdapter_spec.js
@@ -208,6 +208,128 @@ describe('RTBHouseAdapter', () => {
       expect(data.user.ext.consent).to.equal('');
     });
 
+    it('should populate GPP consent string when gppConsent.gppString is provided', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const request = spec.buildRequests(
+        bidRequest,
+        Object.assign({}, bidderRequest, {
+          gppConsent: {
+            gppString: 'DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA',
+            applicableSections: [7]
+          }
+        })
+      );
+      const data = JSON.parse(request.data);
+      expect(data.regs.gpp).to.equal('DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA');
+      expect(data.regs.gpp_sid).to.deep.equal([7]);
+    });
+
+    it('should populate GPP consent with multiple applicable sections', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const request = spec.buildRequests(
+        bidRequest,
+        Object.assign({}, bidderRequest, {
+          gppConsent: {
+            gppString: 'DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA',
+            applicableSections: [2, 6, 7]
+          }
+        })
+      );
+      const data = JSON.parse(request.data);
+      expect(data.regs.gpp).to.equal('DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA');
+      expect(data.regs.gpp_sid).to.deep.equal([2, 6, 7]);
+    });
+
+    it('should fallback to ortb2.regs.gpp when gppConsent.gppString is not provided', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const localBidderRequest = {
+        ...bidderRequest,
+        ortb2: {
+          regs: {
+            gpp: 'DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA',
+            gpp_sid: [8, 10]
+          }
+        }
+      };
+      const request = spec.buildRequests(bidRequest, localBidderRequest);
+      const data = JSON.parse(request.data);
+      expect(data.regs.gpp).to.equal('DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA');
+      expect(data.regs.gpp_sid).to.deep.equal([8, 10]);
+    });
+
+    it('should prioritize gppConsent.gppString over ortb2.regs.gpp', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const localBidderRequest = {
+        ...bidderRequest,
+        gppConsent: {
+          gppString: 'DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA',
+          applicableSections: [7]
+        },
+        ortb2: {
+          regs: {
+            gpp: 'DIFFERENT_GPP_STRING',
+            gpp_sid: [8, 10]
+          }
+        }
+      };
+      const request = spec.buildRequests(bidRequest, localBidderRequest);
+      const data = JSON.parse(request.data);
+      expect(data.regs.gpp).to.equal('DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA');
+      expect(data.regs.gpp_sid).to.deep.equal([7]);
+    });
+
+    it('should not populate GPP consent when neither gppConsent nor ortb2.regs.gpp is provided', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const request = spec.buildRequests(bidRequest, bidderRequest);
+      const data = JSON.parse(request.data);
+      expect(data).to.not.have.nested.property('regs.gpp');
+      expect(data).to.not.have.nested.property('regs.gpp_sid');
+    });
+
+    it('should not populate GPP when gppConsent exists but gppString is missing', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const request = spec.buildRequests(
+        bidRequest,
+        Object.assign({}, bidderRequest, {
+          gppConsent: {
+            applicableSections: [7]
+          }
+        })
+      );
+      const data = JSON.parse(request.data);
+      expect(data).to.not.have.nested.property('regs.gpp');
+      expect(data).to.not.have.nested.property('regs.gpp_sid');
+    });
+
+    it('should handle both GDPR and GPP consent together', function () {
+      const bidRequest = Object.assign([], bidRequests);
+      delete bidRequest[0].params.test;
+      const request = spec.buildRequests(
+        bidRequest,
+        Object.assign({}, bidderRequest, {
+          gdprConsent: {
+            gdprApplies: true,
+            consentString: 'BOJ8RZsOJ8RZsABAB8AAAAAZ+A=='
+          },
+          gppConsent: {
+            gppString: 'DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA',
+            applicableSections: [7]
+          }
+        })
+      );
+      const data = JSON.parse(request.data);
+      expect(data.regs.ext.gdpr).to.equal(1);
+      expect(data.user.ext.consent).to.equal('BOJ8RZsOJ8RZsABAB8AAAAAZ-A');
+      expect(data.regs.gpp).to.equal('DBACNYA~CPXxRfAPXxRfAAfKABENB-CgAAAAAAAAAAYgAAAAAAAA');
+      expect(data.regs.gpp_sid).to.deep.equal([7]);
+    });
+
     it('should include banner imp in request', () => {
       const bidRequest = Object.assign([], bidRequests);
       const request = spec.buildRequests(bidRequest, bidderRequest);