Using a Jedi with Sprint, lead a Gamorrean to an enemy Command Post, to assist in its capture.Mines and time bombs are also good if placed near your Command Post.Alternatively use a sniper and stand well back form the Gamorrean, two headshots should do it.(Note: You can only survive a Gamorrean Axe's hit if you have the guardian award, if you don't have the award it's impossible to survive) Use a Rocket trooper, or Jedi, they are the only units to be able to kill a Gamorrean in one hit, with enough health to survive a hit from the Gamorrean's axe.