diff --git a/src/v0/destinations/ga4/data/GA4CommonConfig.json b/src/v0/destinations/ga4/data/GA4CommonConfig.json
index 3047679056..b6e29044c6 100644
--- a/src/v0/destinations/ga4/data/GA4CommonConfig.json
+++ b/src/v0/destinations/ga4/data/GA4CommonConfig.json
@@ -3,7 +3,10 @@
     "destKey": "user_id",
     "sourceKeys": "userIdOnly",
     "sourceFromGenericMap": true,
-    "required": false
+    "required": false,
+    "metadata": {
+      "type": "toString"
+    }
   },
   {
     "destKey": "timestamp_micros",
diff --git a/test/__tests__/data/ga4.json b/test/__tests__/data/ga4.json
index 1875eeb664..c1beaa1b57 100644
--- a/test/__tests__/data/ga4.json
+++ b/test/__tests__/data/ga4.json
@@ -11807,5 +11807,185 @@
       "version": "1",
       "endpoint": "https://www.google-analytics.com/mp/collect"
     }
-  }
+  },
+    {
+      "description": "(gtag) send integer userId",
+      "input": {
+        "message": {
+          "channel": "web",
+          "messageId": "ec5481b6-a926-4d2e-b293-0b3a77c4d3be",
+          "anonymousId": "ea5cfab2-3961-4d8a-8187-3d1858c99090",
+          "userId": 34567,
+          "context": {
+            "app": {
+              "build": "1.0.0",
+              "name": "RudderLabs JavaScript SDK",
+              "namespace": "com.rudderlabs.javascript",
+              "version": "1.0.0"
+            },
+            "device": {
+              "adTrackingEnabled": "false",
+              "advertisingId": "T0T0T072-5e28-45a1-9eda-ce22a3e36d1a",
+              "id": "3f034872-5e28-45a1-9eda-ce22a3e36d1a",
+              "manufacturer": "Google",
+              "model": "AOSP on IA Emulator",
+              "name": "generic_x86_arm",
+              "type": "ios",
+              "attTrackingStatus": 3
+            },
+            "ip": "0.0.0.0",
+            "library": {
+              "name": "RudderLabs JavaScript SDK",
+              "version": "1.0.0"
+            },
+            "locale": "en-US",
+            "os": {
+              "name": "iOS",
+              "version": "14.4.1"
+            },
+            "screen": {
+              "density": 2
+            },
+            "externalId": [
+              {
+                "type": "ga4AppInstanceId",
+                "id": "f0dd99b6f979fb551ce583373900f937"
+              },
+              {
+                "type": "ga4ClientId",
+                "id": "client_id"
+              }
+            ],
+            "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36",
+            "sessionId": 16678456735
+          },
+          "type": "track",
+          "event": "product added",
+          "properties": {
+            "currency": "USD",
+            "price": 2.4,
+            "quantity": 2,
+            "client_id": "client@1234",
+            "products": [
+              {
+                "product_id": "507f1f77bcf86cd799439011",
+                "name": "Monopoly: 3rd Edition",
+                "coupon": "SUMMER_FUN",
+                "category": "Apparel",
+                "brand": "Google",
+                "variant": "green",
+                "price": "19",
+                "quantity": "2",
+                "position": "1",
+                "affiliation": "Google Merchandise Store",
+                "currency": "USD",
+                "discount": 2.22,
+                "item_category2": "Adult",
+                "item_category3": "Shirts",
+                "item_category4": "Crew",
+                "item_category5": "Short sleeve",
+                "item_list_id": "related_products",
+                "item_list_name": "Related Products",
+                "location_id": "L_12345"
+              }
+            ]
+          },
+          "integrations": {
+            "All": true
+          }
+        },
+        "destination": {
+          "Config": {
+            "apiSecret": "QyWKGHj8QhG2L4ePAPiXCA",
+            "measurementId": "G-T40PE6BET4",
+            "firebaseAppId": "",
+            "blockPageViewEvent": false,
+            "typesOfClient": "gtag",
+            "extendPageViewParams": false,
+            "sendUserId": false,
+            "eventFilteringOption": "disable",
+            "blacklistedEvents": [
+              {
+                "eventName": ""
+              }
+            ],
+            "whitelistedEvents": [
+              {
+                "eventName": ""
+              }
+            ],
+            "enableServerSideIdentify": true,
+            "sendLoginSignup": true,
+            "newOrExistingUserTrait": "firstLogin",
+            "loginSignupMethod": "method",
+            "generateLead": true,
+            "generateLeadValueTrait": "value",
+            "generateLeadCurrencyTrait": "currency"
+          },
+          "Enabled": true
+        }
+      },
+      "output": {
+        "body": {
+          "XML": {},
+          "FORM": {},
+          "JSON": {
+            "events": [
+              {
+                "name": "add_to_cart",
+                "params": {
+                  "items": [
+                    {
+                      "index": 1,
+                      "price": 19,
+                      "coupon": "SUMMER_FUN",
+                      "item_id": "507f1f77bcf86cd799439011",
+                      "currency": "USD",
+                      "discount": 2.22,
+                      "quantity": 2,
+                      "item_name": "Monopoly: 3rd Edition",
+                      "item_brand": "Google",
+                      "affiliation": "Google Merchandise Store",
+                      "location_id": "L_12345",
+                      "item_list_id": "related_products",
+                      "item_variant": "green",
+                      "item_category": "Apparel",
+                      "item_category2": "Adult",
+                      "item_category3": "Shirts",
+                      "item_category4": "Crew",
+                      "item_category5": "Short sleeve",
+                      "item_list_name": "Related Products"
+                    }
+                  ],
+                  "price": 2.4,
+                  "value": 4.8,
+                  "currency": "USD",
+                  "quantity": 2,
+                  "session_id": 16678456735,
+                  "engagement_time_msec": 1,
+                  "client_id": "client@1234"
+                }
+              }
+            ],
+            "client_id": "client_id",
+            "user_id": "34567",
+            "non_personalized_ads": true
+          },
+          "JSON_ARRAY": {}
+        },
+        "type": "REST",
+        "files": {},
+        "method": "POST",
+        "params": {
+          "api_secret": "QyWKGHj8QhG2L4ePAPiXCA",
+          "measurement_id": "G-T40PE6BET4"
+        },
+        "headers": {
+          "HOST": "www.google-analytics.com",
+          "Content-Type": "application/json"
+        },
+        "version": "1",
+        "endpoint": "https://www.google-analytics.com/mp/collect"
+      }
+    }
 ]
\ No newline at end of file