GTO: Great Teacher Onizuka is a Japanese manga series created by Tōru Fujisawa. It follows the story of Eikichi Onizuka, a former gang member and motorcycle racer who becomes a high school teacher. Onizuka's unconventional teaching methods and his desire to connect with students lead to both humorous and heartfelt situations. The series explores themes of friendship, redemption, and the challenges of adolescence. It has been adapted into an anime, live-action television series, and films, gaining popularity for its engaging characters and relatable storylines. GTO emphasizes the importance of understanding and supporting students in their personal growth.