The Gil Snapper is a Soul of Rebirth enemy in Final Fantasy II, resembling the deadly boss from Final Fantasy V. It is a moderate danger to the party until the party acquires Ricard and Josef, at which point they are of little threat. Using strong Ice-elemental weapons and spells is the easiest way of dealing with the monster.
(ギルガメ, Giru-game?) is a spoof of zeni-game which literally means "money turtle," usually refers to the cub of pond turtle. Gil replaces the "zeni" in the name of the animal because it is the currency in the Final Fantasy series."Gil Turtle"