Yea, but we've steered away from it (and probably done the same for others). Yes it can be done, and has been done, but I think the general cost and time involved makes most folks look for another source vehicle that came with the "normal" connector.
You may have better luck finding a more in-depth explanation over on LS1tech. I have seen this however:
http://www.shop.gforce1320.com/product.sc?productId=354
Its designed to bolt a regular driveshaft into a GTO with a tranny swap.