I would say Gork is a pretty good definition of a troll. He goes afk, he never listens to teammates, he plays solo, he teamkills units, hes generally rude, the only thing he says is smileys etc etc etc.
I mean this is a team game. How much fun is it to play with a player that constantly ruins games on purpose? That's not my definition of fun. At least new players try to improve. I enjoy playing with and helping new players but Gorkhali is just the biggest griefer in this mod. He does things like sit in the spawn with artillery and then using all of his other units to protect his artillery and this after playing the mod for two years. I would say that is the exact definition of a griefer.
All you've gotta do is make the enemy fight on his front, he'll set up an impenetrable defense. If battle is on the other side of the map, he probably won't come help you.