If you were to attempt to install google-cloud-sdk natively (via Homebrew) on Apple Silicon, you'd get the following error:
$ brew install --cask google-cloud-sdk
# etc...
==> Installing Cask google-cloud-sdk
Beginning update. This process may take several minutes.
ERROR: (gcloud.components.update) The following components are unknown [kuberun, anthoscli].
==> Purging files for version …