Gabe Kotter is a character from the 1970s sitcom 'Welcome Back, Kotter'. He is portrayed by actor Gabe Kaplan and is the main protagonist of the show. He is a former student of the fictional James Buchanan High School in Brooklyn, New York, who returns to his alma mater as a teacher. He is known for his sarcastic wit and his ability to connect with his students, often referred to as the 'Sweathogs'.