It's not even that. Downstream projects host their own mirrors already, this is an annoying hoop to jump through for the maintainers (basically suck down a bunch of tarballs for every release, analogous to grabbing stuff from FTP sites back in the day), but not exactly a terrible hardship compared to the really very significant work of maintaining a large project.
There might be some merit to a claim that Google Drive isn't a medium customarily used for software distribution these days, but, yeah, it's definitely not paying a thousand+ cent bill in pennies, and I'm skeptical that it's a violation of the letter of the GPL.
It is definitely a dick move by Google.