how do you play gc roms

how do you play the gc roms i mean i download it once but it did not work it said it was corupt after i got it out of the zip file

Then you probably got a corrupted download. It may happen, since these files are relatively huge. Lots of time spent, means more time for corruption to happen.Gamecube games would be played in a Gamecube Emulator. Like Dolphin.
http://www.dolphin-emu.com/news.phpIt works well with some games. Some versions work better with certain games than others. I personally have only played one of the Fire Emblem games, and it worked fine.Or on a modified Gamecube (Which I do not know how to do)

Replying to #2

Xeno GC works best but some homebrew programs may not work so well as it just unlocks all region play and burnt game usage.Or on a modified wii-software or chip works-apparently you could burn several games onto a disc with the right tools and the wii would pick them up-thus saving space and disc :)