diff --git a/dvc/config_schema.py b/dvc/config_schema.py
index bd514c6112..3ea6617189 100644
--- a/dvc/config_schema.py
+++ b/dvc/config_schema.py
@@ -168,6 +168,7 @@ class RelPath(str):
                 "gs": {
                     "projectname": str,
                     "credentialpath": str,
+                    "endpointurl": str,
                     Optional("verify", default=False): Bool,
                     **REMOTE_COMMON,
                 },