Sandy Frank had a show with the same name back in the '80s. Sandy is very protective of his properties. I'm sure GSN asked Sandy for use of the title before going into production or maybe it's no big deal,
I can think of two shoes called
Lie Detector - the ABC game show with Jim Peck, and the syndicated show with F. Lee Bailey (probably the most famous "contestant" was Evel Knievel, who passed when he said that he wasn't responsible for the parachute deploying early in his Snake River Canyon jump attempt) - and I don't remember either one using the plural in the title.
It also sounds like the BBC radio series
Hoax, except that in that one, two of the panelists are telling the truth and one is lying.