I worked in a shop in the early 90's that sold GT mtbs, and at the time I didnt even know they made road bikes as we didnt carry any of them. The road bikes look awesome though in those catalogs, love the fillet brazed, Imron painted models.
I never understood the 'debate' over GT's weighing more or not, if you look at the frames you can see there really isnt any extra material being used in them - the seat stays are just moved a bit forward. I doubt they weighed any more than a standard frame.