This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Gyuki (Japanese)
The gyuki, is from the folklore of western Japan and describes more than one kind, but the depiction of a bovine-headed monster occurs in most. It generally appear on beaches and attack people who walk there. They have brutal, savage personalites. Their appearance varies, mainly based on geographical location.
They usually have an ox's head with sharp upward-curving horns, wicked fangs and a slender tongue. They spit poison and enjoy killing and eating humans. Their body is most commonly depicted as spider-like with six legs and long singular claws at the end of each appendage.
They are said to appears in beaches, in mountains, in forests, in rivers, in swamps, and in lakes.