GTO: 14 Days in ShonanGTO: 14 Days in Shonan.

GTO: 14 Days in Shonan, known as GTO Shonan 14Days in Japan, is a Japanese manga series written and illustrated by Tōru Fujisawa. It is a side story to the main Great Teacher Onizuka manga series. It was published in Kodansha's Weekly Shōnen Magazine from June 2009 to September 2011, with its chapters collected into nine tankōbon volumes.