Onizuka is a reformed biker gang leader who has his sights set on an honorable new ambition: to become the world's greatest teacher... for the purpose of meeting sexy high school girls. Okay, so he's mostly reformed. 
However, strict administrators and a class of ruthless delinquents stand between Onizuka and his goal and they will use any means, however illegal or low, to drive the new teacher away. Perfect, because Onizuka's methods won't be found in any teaching manual; he cares about the difference between legal and illegal activities about as much as he cares for the age difference between himself and a high school girl. 
So get ready for math that doesn't add up, language you'd be slapped for using, and biology that would make a grown man blush... unless of course, you're the Great Teacher Onizuka. 

 Note: Episode 1 has an airtime of 48 minutes.

Episode 1 - GTO - The Legend Begin

Episode 2 - Enter Uchiyamada!

Episode 3 - Late Night Roof Diving

Episode 4 - The Secret Life of Onizuka

Episode 5 - An Eye for an Eye, a Butt for a Butt

Episode 6 - Conspiracies All Around

Episode 7 - The Mother of all Crushes

Episode 8 - Bungee Jumping Made Easy

Episode 9 - Onizuka and the Art of War

Episode 10 - Outside Looking In

Episode 11 - To Be Idolized by a Nation

Episode 12 - The Formula for Treachery

Episode 13 - Only the Best Will Do

Episode 14 - Between a Rock and a Hard Place

Episode 15 - The Great Sacrifice

Episode 16 - Beauty + Brains = A Dangerous Mix

Episode 17 - Falling for The Great Onizuka

Episode 18 - How to Dine and Dash

Episode 19 - Private Investigations

Episode 20 - Love Letters

Episode 21 - Revolution Everywhere

Episode 22 - The Art of Demolition

Episode 23 - Superstition

Episode 24 - Compromising Positions

Episode 25 - Playing Doctor - GTO Style

Episode 26 - Onizuka Meets His Match

Episode 27 - GTO - Agent to the Stars

Episode 28 - Whatever Can Go Wrong, Will Go Wrong

Episode 29 - Studies in High Finance

Episode 30 - Money Talks, GTO Walks

Episode 31 - Destination: Okinawa

Episode 32 - The Law of Probability

Episode 33 - Search and Rescue

Episode 34 - Good Cop/Bad Cop

Episode 35 - Wedding Bell Blues

Episode 36 - Self-Improvement

Episode 37 - Living Together

Episode 38 - Great Treasure Okinawa

Episode 39 - Alone in the Dark

Episode 40 - Matters of the Heart

Episode 41 - Confessions

Episode 42 - Old Wounds Revisited

Episode 43 - Onizuka's Final Battle

Studio Pierrot

Discotek

Aniplex

GTO: Great Teacher Onizuka