Actually NO, there is no mod chip for the Gamecube and that link is just to a web site claiming to be developing a mod chip.
This news about a modchip for gamecube is old news. This website from these "modders" hasn't been updated in ages. You can currently stream iso's over your LAN connection using the PSO exploit right now. It's shotty at best but its a step closer to modded gamecube. It works and I play many games this way on my GC right now. You can backup any GC game using this technique too. I can't wait till they come out with a way to read burned GC iso's in the GC System so I can play all these great backups that I have on my PC HD. If you want to know more about it all you can go here
http://forums.afterdawn.com/forum_view.cfm/112I have to agree with the guy that said the reason the mod chip hasn't been developed yet is because there aren't enough people interested in the GC. I love my modded xbox and a GC simply cannot compare with the versatility of a modded xbox, however, I really like a lot of the games that are out and are coming out for the GC so it will be great when something finally happens for all us GC lovers.