You are misunderstanding how DNS works. Just because I can get a google cloud name server to point example.com at my server does not mean I own the domain. The

You are misunderstanding how DNS works. Just because I can get a google cloud name server to point example.com at my server does not mean I own the domain. The gcloud nameservers are not the authoritative nameservers for the zone unless the root .com registry points at them. Google apps verification only asks the nameservers designated by the registrar for the domain.