helm-external-secrets/docs/snippets/gcpsm-wi-secret-store.yaml

apiVersion: external-secrets.io/v1beta1
kind: ClusterSecretStore
metadata:
  name: gcp-store
spec:
  provider:
    gcpsm:
      projectID: alphabet-123
      auth:
        workloadIdentity:
          # name of the cluster Location, region or zone
          clusterLocation: europe-central2
          # name of the GKE cluster
          clusterName: alpha-cluster-42
          # projectID of the cluster (if omitted defaults to spec.provider.gcpsm.projectID)
          clusterProjectID: my-cluster-project
          # reference the sa from above
          serviceAccountRef:
            name: team-a
            namespace: team-a