The best and easiest advice I can think to give is simply drive in like your going to the Magic Kingdom. GF is located just near the park. You can either go the the park and take the monorail to GF or drive straight to the GF. I'm pretty sure once you pass the "guard" shack that there are signs to get you there, but just to be sure you may just want to ask them at the shack.
Shouldn't be any problem getting dropped off there, just tell them at the gate of the GF that you have a ressie for a meal and then let you right up to the front door.