Include doc on enabling GCE cloud provider for custom clusters

content/rancher/v2.x/en/cluster-provisioning/rke-clusters/cloud-providers/gce/_index.md

@@ -0,0 +1,55 @@
+---
+title: Setting up the Google Compute Engine Cloud Provider
+weight: 3
+---
+
+In this section, you'll learn how to enable the Google Compute Engine (GCE) cloud provider for provisioning custom clusters in Rancher. A custom cluster is one in which Rancher installs Kubernetes on existing nodes.
+
+These steps are required for provisioning GCE Kubernetes clusters that include Windows nodes.
+
+The official Kubernetes documentation for the GCE cloud provider is [here.](https://kubernetes.io/docs/concepts/cluster-administration/cloud-providers/#gce)
+
+> **Prerequisites:** The service account of `Identity and API` access on GCE needs the `Computer Admin` permission. 
+
+If you are using Calico,
+
+1. Go to the cluster view in the Rancher UI, and click **⋮ > Edit.**
+1. Click **Edit as YAML,** and enter the following configuration:
+    ```yaml
+    rancher_kubernetes_engine_config:
+    cloud_provider:
+        name: gce
+        customCloudProvider: |-
+        [Global]
+        project-id=<your projcet ID, optional>
+        network-name=<your network, optional if using default network>
+        subnetwork-name=<your subnetwork of the above network, optional if using default network>
+        node-instance-prefix=<your instance group name/your instance name specific prefix, required>
+        node-tags=<your network tags, must patch one or some tags, required>
+    network: 
+        options: 
+        calico_cloud_provider: "gce"
+        plugin: "calico"
+    ```
+
+If you are using Canal or Flannel,
+
+1. Go to the cluster view in the Rancher UI, and click **&#8942; > Edit.**
+1. Click **Edit as YAML,** and enter the following configuration:
+    ```yaml
+    rancher_kubernetes_engine_config:
+    cloud_provider:
+        name: gce
+        customCloudProvider: |-
+        [Global]
+        project-id=<your project ID, optional>
+        network-name=<your network, optional if using default network>
+        subnetwork-name=<your subnetwork of the above network, optional if using default network>
+        node-instance-prefix=<your instance group name/your instance name specific prefix, required>
+        node-tags=<your network tags, must patch one or some tags, required>
+    services:
+        kube_controller:
+        extra_args:
+            configure-cloud-routes: true # we need to allow
+            # the cloud provider to configure the routes for the hosts
+    ```

content/rancher/v2.x/en/cluster-provisioning/rke-clusters/windows-clusters/_index.md

@@ -94,7 +94,7 @@ If you set a Kubernetes cloud provider in your cluster, some additional steps ar
 
 If you are using the GCE (Google Compute Engine) cloud provider, you must do the following:
 
-- Specify `gce` as the cloud provider in the `cluster.yml`
+- Enable the GCE cloud provider in the `cluster.yml` by following [these steps.]({{<baseurl>}}/rancher/v2.x/en/cluster-provisioning/rke-clusters/cloud-providers/gce)
 - When provisioning the cluster in Rancher, choose **Custom cloud provider** as the cloud provider in the Rancher UI.
 
 # Tutorial: How to Create a Cluster with Windows Support