In the 1980s Gere appeared in several B-movies, such as 1987's Creepozoids, in which she plays the character "Kate", and is billed as Kim McKamy. She acted under the name Kimberly Patton in the television series Space: Above and Beyond from 1995 to 1996; she also appeared under that name in episodes of Silk Stalkings and Millennium. She has also appeared under the Patton name in the films The One and Willard. She began acting in pornographic films in around 1990 and continued to appear in mainstream minor roles such as her appearance in The X-Files in 1994 in the episode "Blood" where she was credited as Kimberly Ashlyn Gere.
As an adult actress, she appeared in nearly 200 films and videos along with directing two videos from 1990 until 2003. As is common in the industry, some of these appearances were uses of previously unreleased video or re-uses from other works and combined into a compilation piece. Early in her career Gere was nominated for and won several major adult industry awards such as the F.O.X.E, XRCO, and AVN Awards.