Google Container Cluster is configured without labels. Labels allow you to better manage your clusters.
In GCP Console -
In Terraform -
References:
https://cloud.google.com/kubernetes-engine/docs/how-to/shielded-gke-nodes
https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/container_cluster#database_encryption
https://cloud.google.com/resource-manager/docs/creating-managing-labels#:~:text=Open%20the%20Manage%20resources%20page%20in%20the%20Google%20Cloud%20console.&text=On%20the%20Manage%20resources%20page,label%20you%20want%20to%20add.