Does anyone know if there is a way to use the gamecube video card which i heard was AGP in a computer as a pc graphics card. Is this possible. Is there a tutorial anywhere? I heard i need some special drivers. can anyone help me with this?

Umm, there is no agp card in the gamecube...

as with all consoles the GPU is built into the motherboard rather than living on a separate "card".

the whole idea of using cards is for upgrade-ability, consoles arn't meant to be upgraded so there is no reason to put things like graphics, sound, network, etc on a separate card.

everything is integrated right into the motherboard.