Why don't you just google? It was the first fucking link I came to.
Sorry to get pissy, but just don't lie and say that "you looked". Clearly, you didn't.
Worldwide Hardware Sales (End of 2005)
PS2 - 101.37 million
Xbox - 24 million
GameCube - 20.61 million
Xbox 360 - 1.5 million
Game Boy Advance - 74.25 million
PSP - 15.03 million
Nintendo DS - 14.43 million
Yes, as usual, these are all official manufacturer shipment figures.
http://forum.pcvsconsole.com/viewthread.php?tid=8498&page=2
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I thought the gap between the Cube and the Xbox was larger? This means the GC could possibly outsell the Xbox before its all said and done?