diff --git a/packages/analytics-js-integrations/__tests__/integrations/GA4/browser.test.js b/packages/analytics-js-integrations/__tests__/integrations/GA4/browser.test.js
index 230d39ac78..8c6fbd2b0e 100644
--- a/packages/analytics-js-integrations/__tests__/integrations/GA4/browser.test.js
+++ b/packages/analytics-js-integrations/__tests__/integrations/GA4/browser.test.js
@@ -13,14 +13,15 @@ const destinationInfo = {
 // jest.mock('this.analytics.getUserId', () => '1234');
 
 describe('Google Analytics 4 init tests', () => {
-  test('Testing init call of Google Analytics 4 with MeasurementId', () => {
+  test('Testing init call of Google Analytics 4 with MeasurementId and SdkBaseUrl', () => {
     const ga4 = new GA4(
-      { measurementId: 'G-123456', debugView: true },
+      { measurementId: 'G-123456', debugView: true, sdkBaseUrl: 'https://www.example.com//' },
       { getUserId: () => '1234', getUserTraits: () => {} },
       destinationInfo,
     );
     ga4.init();
     expect(typeof window.gtag).toBe('function');
+    expect(ga4.sdkBaseUrl).toEqual('https://www.example.com');
   });
 });
 
@@ -56,7 +57,11 @@ describe('Google Analytics 4 Page events tests', () => {
     let ga4;
     const { description, input, output } = event;
     beforeEach(() => {
-      ga4 = new GA4(input.config, { getUserId: () => '1234', getUserTraits: () => {} }, destinationInfo);
+      ga4 = new GA4(
+        input.config,
+        { getUserId: () => '1234', getUserTraits: () => {} },
+        destinationInfo,
+      );
       ga4.init();
       window.gtag = jest.fn();
     });
diff --git a/packages/analytics-js-integrations/src/integrations/GA4/browser.js b/packages/analytics-js-integrations/src/integrations/GA4/browser.js
index 777551494c..37ac164a9b 100644
--- a/packages/analytics-js-integrations/src/integrations/GA4/browser.js
+++ b/packages/analytics-js-integrations/src/integrations/GA4/browser.js
@@ -8,7 +8,7 @@ import {
 import { Cookie } from '@rudderstack/analytics-js-common/v1.1/utils/storage/cookie';
 import Logger from '../../utils/logger';
 import { eventsConfig } from './config';
-import { constructPayload, flattenJsonPayload } from '../../utils/utils';
+import { constructPayload, flattenJsonPayload, removeTrailingSlashes } from '../../utils/utils';
 import {
   shouldSendUserId,
   prepareParamsAndEventName,
@@ -37,6 +37,8 @@ export default class GA4 {
     this.piiPropertiesToIgnore = config.piiPropertiesToIgnore || [];
     this.extendPageViewParams = config.extendPageViewParams || false;
     this.overrideClientAndSessionId = config.overrideClientAndSessionId || false;
+    this.sdkBaseUrl =
+      removeTrailingSlashes(config.sdkBaseUrl) || 'https://www.googletagmanager.com';
     ({
       shouldApplyDeviceModeTransformation: this.shouldApplyDeviceModeTransformation,
       propagateEventsUntransformedOnError: this.propagateEventsUntransformedOnError,
@@ -44,7 +46,7 @@ export default class GA4 {
     } = destinationInfo ?? {});
   }
 
-  loadScript(measurementId) {
+  loadScript(measurementId, sdkBaseUrl) {
     window.dataLayer = window.dataLayer || [];
     window.gtag =
       window.gtag ||
@@ -128,14 +130,11 @@ export default class GA4 {
       this.sessionNumber = sessionNumber;
     });
 
-    ScriptLoader(
-      'google-analytics 4',
-      `https://www.googletagmanager.com/gtag/js?id=${measurementId}`,
-    );
+    ScriptLoader('google-analytics 4', `${sdkBaseUrl}/gtag/js?id=${measurementId}`);
   }
 
   init() {
-    this.loadScript(this.measurementId);
+    this.loadScript(this.measurementId, this.sdkBaseUrl);
   }
 
   /**