Originally Posted by crushkilldstroy

Can you? Yes. Should you? No. It would handle very differently (rake/trail and axle to crown on the fork would be different), you couldn't run the same wheel on it (road wheels and MTB wheels are different diameters) so your front and rear wheel wouldn't match, you couldn't run the same brakes, you'd have to switch to brake levers that are designed for calipers because levers for v brakes don't pull the same amount of cable. If you wanted to switch to drop bars, you'd have to switch the rear v-brakes out for cantilevers because road levers don't work with v-brakes. And all of this is ignoring the fact that the geometry between the two frames is way different.

If you really want a GT road bike, sell your mountain bike and buy a GT road bike. Otherwise, just throw the slicks and a rigid MTB fork on there and you'll be fine.