kubernetes/test/e2e/framework/providers/gcp.go

// LocationParamGKE returns parameter related to location for gcloud command.
func LocationParamGKE() string { … }

// MasterUpgradeGKE upgrades master node to the specified version on GKE.
func MasterUpgradeGKE(ctx context.Context, namespace string, v string) error { … }

// GCEUpgradeScript returns path of script for upgrading on GCE.
func GCEUpgradeScript() string { … }