While Aggregated APIs are more flexible, CRDs are easier to user. Let's try and create the example CRD from the Kubernetes documentation.
First, you'll need to spin up your Minikube cluster and the GKE cluster on GCP, which will be one of your own clusters or a playground such as Katacoda. Let's jump into a Google Cloud Shell and give this a try.
Once on your GCP home page, click the CLI icon, which is circled in red in the following screenshot:
Once you're in the shell, create a quick Kubernetes cluster. You may need to modify the cluster version in case older versions aren't supported:
gcloud container clusters create gswk8s ...