Gibson and his co-writers were nominated for the Emmy Award for outstanding writing for a drama series for their work on "Haunted".

Gibson and his co-writers were nominated for the Humanitas Prize for television in the 60-minute category for their work on the episode "Sanctuary".

Gibson and the rest of the production team were nominated for the Emmy Award for outstanding drama series for their work on the sixth season in 1988.

He was a co-creator of the short-lived ABC family drama The Byrds of Paradise which aired from March to June 1994.

In addition to the pilot he wrote or co-wrote the episodes "Moon, Man", "Mi Casa es Tsunami", "The Bottle Show", "Back in the Saddle" and "Kimo the Magnificent".

He became a co-executive producer for the second season of Bochco and David Milch created ABC police drama NYPD Blue in 1994.

Gibson went on to write the feature films Lethal Weapon 4 (1998),[4][5] Cradle 2 the Grave (2003) and Walking Tall (2004).