Add gke known issue

Signed-off-by: Abigail McCarthy <[email protected]>

Author: a-mccarthy

gpu-operator/google-gke.rst

@@ -80,6 +80,20 @@ Prerequisites
   Refer to `GPU platforms <https://cloud.google.com/compute/docs/gpus>`_
   in the Google Cloud documentation.
 
+.. note::
+
+   When installing NVIDIA GPU Operator v25.10.0 on GKE, there is a known issue in the NVIDIA Container Toolkit v1.18.0, the default toolkit version, that will misconfigure the config.toml file and prevent GPU Operator containers from starting up correctly.
+
+   To resolve this issue, set the ``RUNTIME_CONFIG_SOURCE=file`` environment variable in the toolkit container to resolve this issue. 
+   You can set this environment variable by setting the below in the ClusterPolicy CR:
+
+   .. code-block:: yaml
+
+      toolkit:
+        env:
+        - name: RUNTIME_CONFIG_SOURCE
+          value: "file"
+
 
 *********************************
 Using the Google Driver Installer

gpu-operator/release-notes.rst

@@ -188,6 +188,17 @@ Known Issues
 
   Create the ConfigMap, then update the ClusterPolicy with the name of the configMap in the ``vgpuDeviceManager.config.name``, and restart the vgpu-device-manager pod.
 
+- When using GKE, there is a known issue in the NVIDIA Container Toolkit v1.18.0 that will miss configure the config.toml file and prevent GPU Operator containers from starting up correctly. 
+  To resolve this issue, set the ``RUNTIME_CONFIG_SOURCE=file`` environment variable in the toolkit container to resolve this issue. 
+  You can set this environment variable by setting the below in the ClusterPolicy CR:
+
+  .. code-block:: yaml
+
+     toolkit:
+       env:
+       - name: RUNTIME_CONFIG_SOURCE
+         value: "file"
+
 .. _v25.3.4:
 
 25.3.4