I'm not dead certain, but I believe the wheels of all SC models to be completely interchangable, 2006 to present. Don't know about ST wheels. Here are a few notes on the job in general. Hope that you find them useful.
You won't have to break the chain on the GT, just drop the wheel to the ground, roll it forward, and remove the chain from the rear sprocket to the left.
It took me about three hours to do the whole job, and I really work slow. An extra pair of hands is really useful when reinstalling the rear wheel assembly.
You will have to remove your front fender. This is easy.
I assume that you'll be swapping your own rotor discs, front and rear. This is a bear as the rotor bolts are REALLY torqued and further secured with green loctite. It is almost impossible to reuse the bolts as the head of at least one will be boogered beyond redemption! I ordered new titanium bolts from TPO, further reducing unsprung weight. Or, you can order a new set of stock bolts from Ducati. If you go the titanium route, don't forget to reinstall the new bolts with a good anti-sieze compound. I like "Ti-prep". (You MUST use steel bolts for the rear disc as they are what is read by your speedo sensor.)
The cushion drive from your GT (39T) will slide right on. IIRC, the stock rear sprocket on your "new " wheels is 40T.
Protect your componants with plenty of towels, or rags, or whatever, or you'll end of with lots of little preventable dings and scrapes!
This was the best mod that I've done to the bike so far. I was going to completely replace the suspension after switching out the wheels, but now I like the ride and handling just fine, and so never did it. Suspension compliance is now excellent. The bike no longer has a tendency to head slap either. The wheels look just right, too.
GT1000 torque values, in Nm (and Ft. Lbs.): Brake disc bolts, 24 (18); front axle, 63 (47); Rear axle, 150 (111).
Go for it!