Have you received the frame yet? Can you query the seller?
The real question is whether the frame has a BB30 shell (or PF 30 or other variation on large diameter press in bearings) or has a threaded English BB shell. The frame itself won't have a GXP, that would be the type of BB bearing cups you'd thread into an English BB shell to support SRAM or other GXP cranks. And FWIW, the difference is in bearing diameter and whether the bearings are pressed into the frame vs. screw threads in the BB shell to accept a thread in set of bearings (e.g. GXP, Shimano, Campy Square taper, etc.), it's not strictly a shell width question though some of the newer oversized BB standards vary in shell width even though they all use oversized 30mm press in bearings.
Anyway the Devinci website specs a GXP bottom bracket for their currently listed TT bike, I doubt the older 2008 model used a BB30 or other oversized BB and then they went back to an English BB but it's best to check.
FWIW, you can run a GXP crankset (24 mm spindle) in a BB30 or other oversized BB with inexpensive reducing bushings but you cannot run a BB30 sized crankset (30mm spindle) in a bike with an English bottom bracket. So if you can't find out for certain and can't wait to check when the frame arrives then the safe move is to purchase a crank with a 24mm spindle (e.g. GXP) and use adapters like these if it turns out your bike is actually BB30: http://compare.ebay.com/like/350689258330?var=lv<yp=AllFixedPriceItemTypes&var=sbar
-Dave
BB30 OR GXP if i go sram?
