You see his name on cards like Ring of Gix, Claws of Gix, and Priest of Gix, and maybe you even know that's him on the art of the original Urza's Saga oppression. But what else do we know of Gix?
The Urza's Saga Styleguide doesn't offer much more help, descibing Gix simply as a "demonic construct of Yawgmoth himself, built of bone, machine parts, and soft yucky meat stuffs." Sounds delicious.