74 years (March 31, 1945) Click to see full answer. Keeping this in view, how much is Gabe Kaplan worth?Gabe Kaplan Net Worth: Gabe Kaplan is an American comedian, actor, investor and professional poker player who has a net worth of $50 million. Gabe Kaplan first gained fame by appearing in the sitcom “Welcome Back, Kotter”. Today he is known for appearing on High Stakes Poker on GSN.One may also ask, what did horshack die of? Ron Palillo, the boyish actor who played Arnold Horshack, the remedial-class loser on Welcome Back, Kotter, died Tuesday morning at his home near Palm Beach, Fla., TMZ reports. He was 63. He suffered an apparent heart attack and was found by his longtime companion, Joseph Gramm, according to the report. Moreover, when was Gabe Kaplan born? March 31, 1945 (age 74 years) Is Gabe Kaplan still alive from Welcome Back Kotter?Kaplan still does stand-up when he feels like it and is reportedly working on a new version of “Welcome Back Kotter.” By the way, don’t think that just because he is no longer a TV star that he lives some kind of “has been” life. Kaplan’s net worth is estimated at around $50 million. Not bad for a teacher!