Next was Skidoo in which he played a prison guard.
After that, he played "Blue Boy" in the John Wayne epic The Undefeated:
In 1970 Gabriel played Lt. Holloway in the TV show Ironsides
In the TV Series Wonder Woman he played himself.
The next year, 1979 he again played himself in The Misadventures of Sheriff Lobo, the premise being an annual rival football game with another Sheriff's.