Why does my X1900GT's sticker say GTO?

[f4phantom2500]

http://theinquirer.net/images/articles/19g2.jpg

My X1900GT has a sticker like that on it, what does it mean? AFAIK it can't unlock, I remember in Rabit it said it had the XL bios, so what does this sticker mean?

 

[Sniper82]

this might explain it(don't know though):

http://xtreview.com/review150.htm

 

[Roguestar]

Probably what they were going to call it when they settled on X1900GT to compete directly with the 7900GT.

And AFAIK there is no XL model either.