Anyone know if there are GCN, Xbox, and PS2 Emulators that have working Isos you can run on them? I've checked all over Google for these, I'm not sure if any of these even exist or even run properly. But if there are, perhaps this site can start posting them?
They exist, but they don't always run very as fluent as people would like, and you'll need a seriously fast computer. Check for more: http://www.emulator-zone.com/
If you have to ask us questions about this kind of stuff, you most likely don't have the hardcore pc you'll need to run it!
Our CPUs or emulating software for that matter hasn't evolved beyond a point of laggyness. The ability to emulate previous-gen on an OS is still flawed. As for ISOs, you'll have to use a torrent, although some sites host the actual rom.