I voted Yes, when a PC version is released.
I like GTA overall, (though I couldn't finish GTAIV, just was too bored) but I'm not buying the game twice. Rockstar is too greedy, and they're just betting on PC gamers being too impatient to wait for the PC version and buy the game on console first. I made the mistake on GTAIV, I'm not doing it again.
Especially looking at how ugly it looks on current consoles. GTAIV on PC with mods and all is just 100x better than the console version. (Well, GTAIV was so poorly optimized at launch though...)
I've only watched a few videos about GTA Online and it's Crew feature. It sounds fun, if a bit grindy. I was hoping for larger servers as well, it seems you can only have like 15-20 players on one server? I might be wrong.
I will definitely try it once it's available on PC, probably in 6-8 months. However, for now, I can't create any HyperionGaming.org "official" Crew since I don't have the game. It's still a great idea however Falconeer, and it would be fun to try at least