doesn't it have a switch part in it? (i don't own a ipod actually, so i don't know for sure. i mean, like when you press harder..)Edit-yes, an Ipod clickwheel can be used, but not the touch sensitive part. You would likely need a switch.
I sort of agree with Basement_Modder here a bit. It's good to learn basic soldering techniques, and start with some basic LED mods and case mods before you jump into GCp's with ipod wheels built-in. It saves you a lot of time, frustration and money.
I did not follow that advice, and I have somewhere around a dozen broken gamecubes littering my closet, along with several fried screens and other systems.