GTO - Great Teacher Onizuka is a cheeky critique of Japanese society - Hypercritic

GTO is an hilarious social commentary about the shenanigans of Onizuka, former gang member with a pure heart, on his way to become a teacher.

Hypercritic

GTO (1998) [No Spoilers]

Mangaka Masterwork: Great Teacher Onizuka - NitWitty Magazine

Manga Review Anime Was Not a Mistake

Great Teacher Onizuka (TV) (w/ index). - Forum - Anime News Network

GTO (1998) [No Spoilers]

GTO: Great Teacher Onizuka - AsianWiki

Lesson 25: Playing Doctor - GTO Style

Lesson 3: Late Night Roof Diving