GTO franchise order
If you just want to read GTO, even without reading previous entries you will understand 98% of the story.
Bad Company happens before Shonan Junai Gumi but I think it's better to read after (also, it released after).
Ino-Head Gargoyle is a spin-off and can be skipped, but it does add something to Saejima as a character.
GT-R is also a spin-off that (in my opinion) doesn't add anything to the story, so it can be skipped.
There is also Shonan Seven, but the only connection it has to GTO franchise is that it takes place in the same region and high school as Shonan Junai Gumi, therefore I didn't add it to the stack.
Eikichi Onizuka and Ryuuji Danma are members of infamous biker gang, Oni Baku. When not out riding around, they can be found in school, trying to pick up young women. This is the story of the young Onizuka, who would later become the greatest teacher in Japan. (Source: ANN)
Before Eikichi Onizuka became a legend, before Onibaku, before he became GTO, he was just a normal junior high school delinquent. Getting into fights with his seniors, trying to pick up girls and just hanging out with his friends. Bad Company is a compilation of many short stories, linked together with the characters of Eikichi, Ryuji and their school buds. Such stories involve the origins of Eikichi`s bike, which we see frequently in GTO, the first meeting with the Midnight Angel and many other.
22-year-old Eikichi Onizuka: pervert, former gang member... and teacher? Great Teacher Onizuka follows the incredible, though often ridiculous, antics of the titular teacher as he attempts to outwit and win over the cunning Class 3-4 that is determined to have him removed from the school. However, other obstacles present themselves throughout—including the frustrated, balding vice principal, Hiroshi Uchiyamada; old enemies from his biker days; and his own idiotic teaching methods. But Eikichi fights it all whilst trying to help his students, romance fellow teacher Azusa Fuyutsuki, and earn his self-proclaimed title. [Written by MAL Rewrite] Also contains the gaiden "GTO: Great Toroko Oppai♡" (Tomoko's Big Adventures).
This is a spin-off story of the manga GTO (Great Teacher Onizuka) that takes place directly after the Teshigawara arc. After Eikichi Onizuka was shot by former teacher Teshigawara, he was sent to the hospital. Shortly afterwards, he escaped and spent 14 days that no one knew about. Strangely enough, when he returned, a wanted poster appeared with a man that resembled Onizuka. What exactly did he do during these 14 days? (Source: MU)
Being one of the few longtime friends with Onizuka (GTO), Danma Ryuji has seen all the fiascoes he has gotten into. But the motorcycle shop owner and self proclaimed fastest driver in the city is about to get into a world of trouble. A hot teenager named Ishikawa Mimon starts taking interest in Ryuji, but contrary to her appearance, she's a dangerous person that will put Ryuji into life threatening situations. Even though he has a beautiful girlfriend named Nagisa, Mimon is about to wreak havoc in Ryuji's peaceful life. (Source: MangaHelpers)
Known as the gargoyle of Inokashira Park police station because of his scary face, Saejima Toshiyuki was a loser. He's pretty much a virgin for all intent and purposes, aside from the companions that he pays for. He wasn't always a loser though. During his high school days, he was feared as a badass, but now he is just a person people feel sorry for. He then meets Arimori Shizuka, a beautiful girl that seems comfortable in her sexuality. Toshiyuki learns that she was a high class escort that has been with over 1000 men. She was doing it out of love for her abusive boyfriend but, realizing her mistake, quits. Shizuka is now being harassed and Toshiyuki reverts back to his aggressive personality to protect the love of his life. (Source: MangaHelpers)
Onizuka is a prisoner. For reasons that he only knows, he tells the story himself of what happened between him and Class G (which is basically an idol class), expect many troubles, adventures and of course many hilarious moments. (Source: MU)
