Gabe Kotter is a fictional character from the television series Welcome Back, Kotter, which aired from 1975 to 1979. He is portrayed by actor Gabe Kaplan and serves as a teacher at James Buchanan High School in Brooklyn, New York. Kotter is known for his laid-back attitude and his efforts to connect with his students, who are often referred to as the "Sweathogs." The show focuses on Kotter's interactions with his diverse group of students, each with their own unique personalities and challenges. The series highlights themes of education, friendship, and the struggles of adolescence, making it a memorable part of 1970s television culture.