The Gnome Coach is a gnome that can be found at the Tree Gnome Stronghold. He is the NPC who shouts at players participating in the Gnome Ball minigame.
He is a potential easy customer in the Gnome Restaurant minigame.
He is one of the non-player characters who may be spoken to for a treasure trail. He will then ask players "How many gnomes on the gnomeball field have red patches on their uniforms?" and the answer is 6.