Navigate from Administrator -> Infrastructure -> Add to create Infrastructure with GKE Standard Cluster.
Name: nonprod
Account: Google Cloud account
VPC CIDR: 10.11.0.0/16
Cloud: Google
Region: us-east1
Subnet CIDR: 22
Enable GKE: enabled
Cluster Mode: GKE Standard
This takes about 20 minutes. Infrastructure status should move to Completed. Once the Infrastructure status shows Complete, navigate to Administrators -> Plans to verify that a plan has been created with the same name (nonprod).
You can view the details and download the kubeconfig file to connect the cluster from GKE Tab available in the infrastructure created.