Broodax is an insectoid alien entity, part of the Broodax Imperiate. His species, who are born in the flesh of mammalian beings, are evidently invading earth in secret.
Gabe was briefly a host for Broodax, until Tycho caught him playing Settlers of Catan, ruining his disguise. A brief moment of sarcasm, and Broodax burst from his Gabe-skin, undoing all his subterfuge. He then made a fairly bad attempt at pretending he was "just kidding".
Later he would appear in the form of Jack Thompson , only to reveal himself as wishing to devour the presiding judge.