- "Private Gibson here. I'm on my way to the Rookie. We had to pull back, it was a slaughterhouse back there."
- ―Pvt. Gibson (from Aliens vs. Predator)
Private Gibson was a member of the United States Colonial Marine Corps, part of the 1st Battalion, 3rd Regiment. He was stationed aboard the USS Marlow, dispatched to BG-386 in response to a Xenomorph outbreak at the Freya's Prospect colony and the nearby Weyland-Yutani facility. During the BG-386 operation, he was part of Echo Team.
The mission was a disastrous failure, with the Marlow being destroyed and virtually all of the Marines deployed being killed. Gibson was ambushed in an elevator within the colony whilst trying to rendezvous with Rookie, and, judging by the absence of his body, was presumably taken to the Hive to be cocooned.
Gibson was part of the Marine contingent on the USS Marlow when it was sent to BG-386, and was among the Marines not on board when the ship was destroyed by Dark's vessel. His squad, Echo Team, regrouped inside C-Block within the colony of Freya's Prospect, searching the complex for survivors and to check for Xenomorph threats. While investigating the colony's strip club, Club Eden, a swarm of Xenomorphs attacked. Most of the squad was killed, and the survivors pulled back before Rookie could reach them to assist. When Rookie finally arrived, Gibson got into an elevator to meet him, but was ambushed within. Rookie reached the elevator soon afterwards, finding blood splattered on the floor and wall, and part of the ceiling ripped open. Due to the absence of any physical remains, it seems likely Gibson was taken to the Hive and cocooned.
- Gibson is a multiplayer skin in the game, unlocked when players reach Rank 2. He is the first unlockable skin in the game.
- Many NPC Marine characters used Gibson's skin, much like Franco's.
- There is a Marine in the introductory cutscene to the Alien campaign level "Colony" who resembles Gibson, but uses (male) Connor's voice. He is likely meant to be an anonymous marine.
- The name "Gibson" was chosen by a member of the design team in reference to science fiction author William Gibson, who wrote an unproduced script for Alien3 in the late 1980s.
- Aliens vs. Predator (video game)