Is this the whitest opinion ever?
I know you're basically trolling but employing the occasional funk rhythms and "repeating riffs" does not automatically make it funk. By this rationale, lots of prog groups are also funk groups, from Yes ("Roundabout") to King Crimson ("Red"). And the question of whether people will dance to something is *always* subjective and therefore a pretty flimsy argument in general.
That being said, I can easily imagine the main riff of "Black Cat" (one of my favorite GG songs) being played by a funk band. That'd definitely be worth checking out.