She appeared in films Night of the Running Man (1995) and The Quest (1996), and later, from 1996 to 1999, she starred as Detective Cassandra St. John in the USA Network crime drama series, Silk Stalkings.
Standing 5'3", she worked at a variety of jobs, including a car saleswoman, personal assistant, flight attendant with Southwest Airlines and as one of the Dallas Cowboy Cheerleaders for two seasons in the early 1980s.
Her opening into acting came as Susan Howard's stunt double on the television series Dallas in 1988.
Gunn had starring role of Kelly Cochran in the CBS series Dark Justice from 1992 to 1993.
Gunn also guest starred on In the Heat of the Night, Dream On, Diagnosis: Murder, CSI: Crime Scene Investigation and Crossing Jordan.