I just moved a simple, static website to GCP, and it's working fine. But I want to keep using a separate company as registrar, not the hosting company. So as a shortcut, I just set the www CNAME at the registrar's site to c.storage.googleapis.com, without using Google's DNS - and this works.
But is it good practice? If not, could someone recommend a step-by-step guide to setting up a public zone on GCP? Google's documentation is complicated, getting into private zones, authentication, and service accounts, which I probably don't need.