***Sits on hands and desperately tries not o think n+1 thoughts***
Options:
a) Resell it. Get most of your money back (possibly all if the right people spot it). You could try selling it on Singletrack...
b) Break it up, and sell it. The middleburn cranks and XTR brakes will sell well. The wheels should get a few quid if they're reasonable, and the other stuff will get a fiver here and a fiver there...
c) Turn it into a 69er... According to the GT website, the fork's 470mm long, so the total crown-ground length is about 840mm. If you put, say, a Rockshox Tora fork (505mm) on with a 26" front wheel, the same measurement would be 835mm at 130mm travel.
Note, though, that the Peace has a 72 degree head angle as standard, so the steering might get a bit twitchy as the suspension compresses...