Gor Grimgut is a Bloodmaul ogre that is guarding [The Thunderspike] in the back of the Draenethyst Mine in the Blade's Edge Mountains. When Horde players on the quest 
[67] The Thunderspike try to pick up the Thunderspike, he wil spawn and start attacking. His only special ability is a Furious Rage which boosts Attack Power and Attack Speed. Once he is dead, players can take the Thunderspike from his corpse.
Although he shares the same last name with Murta Grimgut, they are apparently not related.