This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Gorgades (Medieval Bestiary)
The Gorgades may refer to a group of islands off the Atlantic coast of Africa (the Insulae Gorgades, perhaps the Canaries or the Cape Verde islands), as well as the fabled tribe of native inhabitants, the women of which were covered entirely with hair (an idea perhaps derived from ancient sailors' accounts of some species of ape or monkey).
Ancient sources
Their earliest known mention appears in the World of Pomponius Mela, which speaks of "a huge island, on which they say there are only women, bristly in their whole body, and fruitful of their own accord without any connections with males: of so savage and excessively wild manners that some of them can scarcely be restrained by chains from struggling."