Johnny Gat can be Unlocked as a Zombie by completing the game. Unlike other Zombie Homies, it is not required to call Eye for an Eye to resurrect Gat. Like the previous two Zombie Homies, he arrives in a Reaper when called up.
If the player goes to fight zombies, Gat will assist him in doing it. The zombies will also attack Gat, however he manages to fight them off. Zombie Gat will also attack pedestrians walking about. All enemies/pedestrians will die instantly from a Zombie Gat punch.
Zombie Gat's injuries, for the most part, reflect on his state during death, as there is blood on his shirt, being shot at by several of Loren's henchmen.
Zombie Gat is one of three possible zombie homies in the Saints Row series, the other two being Zombie Lin (Saints Row) and Zombie Carlos (Saints Row 2).
When looking closely at Gat's broken glasses you can see Gat's eyes.
Despite having a unique homie icon in the cell phone when called to the Player's aid he will use the same icon he used when he was alive.
Zombie Gat is not invincible and will sometimes get downed if he takes a lot of explosion/ramming damage. He has 20000 hitpoints, and is second in hitpoints to Professor Genki, who has 32768 hitpoints.
Scott Phillips has confirmed that Johnny Gat is really dead.
Out of all of the three zombie homies in the Saints Row franchise (Zombie Gat, Zombie Carlos, Zombie Lin), Zombie Gat looks and acts the most human, though he does have qualities synonomous to Zombie Carlos and Zombie Lin.
He walks like a normal human, as does Zombie Carlos.
He doesn't use any weapons (with some rare exceptions), like Zombie Lin, who uses her own arm as a blunt object. Although he will use vehicle weapons.
Unlike Zombie Lin and Zombie Carlos, Zombie Gat can occasionally be heard saying coherant words.
When Zombie Gat is a Homie, a disembodied voice can occasionally be heard pleading for cover fire.
It is possible, however very rare, for Zombie Gat to pick up a weapon and use it. With a weapon he is basically a homie of Johnny Gat, albeit with a zombie appearance.