* NamesTheSame: Mr. Sakurai, the English teacher and Mrs. Sakurai, the head of school, are not related. In the anime, Mr. Sakurai is renamed Sakurada to prevent confusion.
* RelationshipVoiceActor: One of many things that boasts ''GTO'' is having the voices of the main characters of three Gundam series, specifically [[Anime/AfterWarGundamX Garrod Ran]] as [[Creator/WataruTakagi Onizuka]], [[Anime/MobileSuitGundamWing Heero Yuy]] as [[Creator/HikaruMidorikawa Kikuchi]], and [[Anime/MobileFighterGGundam Domon Kasshu]] as [[Creator/TomokazuSeki Murai]].
* RomanceOnTheSet: The live-action actors of Onizuka and Fuyutsuki ended up together in RealLife.
* StarMakingRole: Onizuka was Creator/WataruTakagi's breakout role as a main character.