diff --git a/MIGRATION_GUIDE.md b/MIGRATION_GUIDE.md
index 558188ae1b..1c0fa76fb0 100644
--- a/MIGRATION_GUIDE.md
+++ b/MIGRATION_GUIDE.md
@@ -105,6 +105,19 @@ Looking to upgrade from Sentry SDK 2.x to 3.x? Here's a comprehensive list of wh
   | `aws_event["headers"]["Host"]`              | `server.address`        |
   | `aws_context["function_name"]`              | `faas.name`             |
 
+- If you're using the GCP integration, the `sampling_context` argument of `traces_sampler` doesn't contain the `gcp_env` and `gcp_event` keys anymore. Instead, the following, if available, is accessible:
+
+  | Old sampling context key          | New sampling context key   |
+  | --------------------------------- | -------------------------- |
+  | `gcp_env["function_name"]`        | `faas.name`                |
+  | `gcp_env["function_region"]`      | `faas.region`              |
+  | `gcp_env["function_project"]`     | `gcp.function.project`     |
+  | `gcp_env["function_identity"]`    | `gcp.function.identity`    |
+  | `gcp_env["function_entry_point"]` | `gcp.function.entry_point` |
+  | `gcp_event.method`                | `http.request.method`      |
+  | `gcp_event.query_string`          | `url.query`                |
+
+
 ### Removed
 
 - Spans no longer have a `description`. Use `name` instead.
diff --git a/sentry_sdk/integrations/aws_lambda.py b/sentry_sdk/integrations/aws_lambda.py
index 656d71ec8e..177d73a638 100644
--- a/sentry_sdk/integrations/aws_lambda.py
+++ b/sentry_sdk/integrations/aws_lambda.py
@@ -468,7 +468,9 @@ def _event_from_error_json(error_json):
 
 
 def _prepopulate_attributes(aws_event, aws_context):
-    attributes = {}
+    attributes = {
+        "cloud.provider": "aws",
+    }
 
     for prop, attr in EVENT_TO_ATTRIBUTES.items():
         if aws_event.get(prop) is not None:
diff --git a/sentry_sdk/integrations/gcp.py b/sentry_sdk/integrations/gcp.py
index 6ca52397d8..2f17464f70 100644
--- a/sentry_sdk/integrations/gcp.py
+++ b/sentry_sdk/integrations/gcp.py
@@ -84,22 +84,12 @@ def sentry_func(functionhandler, gcp_event, *args, **kwargs):
                 headers = gcp_event.headers
 
             with sentry_sdk.continue_trace(headers):
-                sampling_context = {
-                    "gcp_env": {
-                        "function_name": environ.get("FUNCTION_NAME"),
-                        "function_entry_point": environ.get("ENTRY_POINT"),
-                        "function_identity": environ.get("FUNCTION_IDENTITY"),
-                        "function_region": environ.get("FUNCTION_REGION"),
-                        "function_project": environ.get("GCP_PROJECT"),
-                    },
-                    "gcp_event": gcp_event,
-                }
                 with sentry_sdk.start_transaction(
                     op=OP.FUNCTION_GCP,
                     name=environ.get("FUNCTION_NAME", ""),
                     source=TRANSACTION_SOURCE_COMPONENT,
                     origin=GcpIntegration.origin,
-                    custom_sampling_context=sampling_context,
+                    attributes=_prepopulate_attributes(gcp_event),
                 ):
                     try:
                         return func(functionhandler, gcp_event, *args, **kwargs)
@@ -229,3 +219,33 @@ def _get_google_cloud_logs_url(final_time):
     )
 
     return url
+
+
+ENV_TO_ATTRIBUTE = {
+    "FUNCTION_NAME": "faas.name",
+    "ENTRY_POINT": "gcp.function.entry_point",
+    "FUNCTION_IDENTITY": "gcp.function.identity",
+    "FUNCTION_REGION": "faas.region",
+    "GCP_PROJECT": "gcp.function.project",
+}
+
+EVENT_TO_ATTRIBUTE = {
+    "method": "http.request.method",
+    "query_string": "url.query",
+}
+
+
+def _prepopulate_attributes(gcp_event):
+    attributes = {
+        "cloud.provider": "gcp",
+    }
+
+    for key, attr in ENV_TO_ATTRIBUTE.items():
+        if environ.get(key):
+            attributes[attr] = environ[key]
+
+    for key, attr in EVENT_TO_ATTRIBUTE.items():
+        if getattr(gcp_event, key, None):
+            attributes[attr] = getattr(gcp_event, key)
+
+    return attributes
diff --git a/tests/integrations/gcp/test_gcp.py b/tests/integrations/gcp/test_gcp.py
index 22d104c817..f33c1b35d7 100644
--- a/tests/integrations/gcp/test_gcp.py
+++ b/tests/integrations/gcp/test_gcp.py
@@ -304,16 +304,12 @@ def cloud_function(functionhandler, event):
                 try:
                     traces_sampler.assert_any_call(
                         DictionaryContaining({
-                            "gcp_env": DictionaryContaining({
-                                "function_name": "chase_into_tree",
-                                "function_region": "dogpark",
-                                "function_project": "SquirrelChasing",
-                            }),
-                            "gcp_event": {
-                                "type": "chase",
-                                "chasers": ["Maisey", "Charlie"],
-                                "num_squirrels": 2,
-                            },
+                            "faas.name": "chase_into_tree",
+                            "faas.region": "dogpark",
+                            "gcp.function.identity": "func_ID",
+                            "gcp.function.entry_point": "cloud_function",
+                            "gcp.function.project": "SquirrelChasing",
+                            "cloud.provider": "gcp",
                         })
                     )
                 except AssertionError: