I'm trying to get my gamecube games to work on my wii with vga cable to my computer monitor. I there any way to do this. I've got a couple of multi game discs using GCOS and some normal games. The vga cable can only output in 480p but gamecube games can't for some reason because I do get sound but no video. Virtual console games won't work either.

Some games I've been trying:
Super Mario Sunshine
Zelda Wind Waker
Zelda Four Swords
Mario Kart DD
Super SSmash Brothers Melee

 

I don't get any video output at all, it's just a black screen. I don't get n64 games working either. I heard something about progressive scan but don't get what it does or is.

 

I remember that on gamecube, PAL game can not output 480p except with the japanese D-terminal cable.
NTSC games can output with D-terminal or other cables just the same.

it has something to do with adding the 60hz option, they half broke the 480p converting the games (and never corrected it)

 

Yes, it'll work on any 480p compatible NTSC game (you may have to hold B when loading and choose 480p in the dark still, if the selection menu is 480i. in that case try it on another tv so that you see what it looks like.)