gee a gamemachine with an OS...who whould have thunk it...and no, there is no ROM inside the gamecube, it all comes from the disc...don't forget - OS != gui, an OS gives you access to hardware...put an Amiga GUI on it and abstaction layer for AHI sound and RTG graphics and boom - Amiga.
:roflmao::roflmao::roflmao::roflmao::roflmao::roflmao:
you really should do some reading up on what an OS is.
By your logic I should be able to run KDE on DOS, or at least port it with minimal effort, because all the OS is is an interface to the hardware.