He is known for playing the recurring role as Charlie on 16 episodes of the American sitcom television series Alice.

[1][2] He continued his career, mainly appearing in film and television,[3] often cast as a policeman, bad guy or anonymous roles, over the years.

[1] Later in his career, Gehring guest-starred in numerous television programs including Gunsmoke, Battlestar Galactica (and its spin-off Galactica 1980), M*A*S*H, Star Trek: The Original Series, Get Smart, Bonanza, The Rockford Files, Three's Company, Emergency!,[4] Little House on the Prairie, Quincy, M.E., Daniel Boone, Death Valley Days, Adam-12 and Mission: Impossible.

[5][6] He also appeared in films such as The Best Little Whorehouse in Texas, Nickelodeon, Bound for Glory, The Apple Dumpling Gang Rides Again, When Time Ran Out..., The Legend of the Lone Ranger, The Domino Principle and Rafferty and the Gold Dust Twins.

[5] Gehring has also played the role as "Sydney Forbes" in the soap opera television series Days of Our Lives, from 1980.