when doing forwarding, yeah, it doesn't look like it. When I tried to add an alias on my gmail.com it asked for my SMTP account. I guess maybe I've never done that off a free gmail before (just paid / grandfathered Workspace ones!) - so it'll work well for anything inbound that's needed. But yeah, if you need outbound, still an open. Still assuming Google Domains allows you a basic Workspace account though.