I am buying a Gamecube for a friend's son in SP. The nice-guy salesman at GameStop told me that only countries which have NTSC television signals can use the Gamecube. He said that some countries in Central America (and Europe) use PAL or SECAM signals and Gamecube won't work with them.
I am blissfully unaware of the status of TV signals in SP (I spend my time there otherwise occupied!), but would sincerely appreciate any information you have.