Gavin is first seen in the interrogation room watching Hank Anderson trying to interrogate a captured HK400 for murdering Carlos Ortiz, his owner. When he is not getting any answers, Connor, the android sent by CyberLife, suggests he would interrogate it, causing Gavin to laugh at this suggestion. After the interrogation is over, he ordered Chris Miller to drag the android into a cell, but it refuses to move. If Connor tried to interfere three times, Gavin points a gun at him, but Hank stopped him by holding a gun at him as well. Gavin will get angry at both of them and walks out.
He is later seen hanging out with a female cop named Tina Chen when Connor comes to Detroit Police Department looking for Hank. If Connor choose to make coffee for him, Gavin will knock it away from him and threaten Connor to stay out of his way. If he refuse or ignore Gavin, Connor will say he only follows Hank Anderson's orders and not Gavin's orders. Gavin punches him in the stomach and says that if Hank was not around during the interrogation, he would have damaged him badly for disobeying a human (if Hank and Connor interfered with Gavin on the HK400) or say when a human gives an order Connor should obey. He and officer Chen will walk away.
Later on, he's seen at the Eden Club investigating the death of Michael Graham caused by a blue-haired Traci. When Connor and Hank arrived to investigate, he immediately leaves, but not before insulting the latter of being an alcoholic and shoving the former upon leaving.
Lastly, he is seen at the police station insulting Connor when he walked to the evidence room due to the fact that he's no longer needed in the case. If Connor chooses to talk to him in an ironic tone or ignores him, Gavin will appear with a gun after he found the location to Jericho, a refuge for deviant androids. Despite Connor's pleas that he can stop the deviants, Gavin ignored his protest, and he attempts to kill him. Unfortunately for him, Connor triumphs the fight, leaving him knocked down unconscious. Richard Perkins, an FBI agent, and other police officers will see him on the floor and Perkins will tell an officer to sound the alarm that someone has been tampering with his evidence.
- Gavin is similar to Carter Blake from Heavy Rain due to his role and personality, both characters are also from David Cage video games.