* SugarWiki/AwesomeMusic: The first opening theme, [[http://www.youtube.com/watch?v=dWwwY4tNcsU Driver's High]] by L'arc en Ciel.
** [[http://www.youtube.com/watch?v=ac3uBNn_Y_Y#t=6m39s "In a world where we can't ever say what's in our heart, POISON..."]]
* BittersweetEnding: [[spoiler:The final two episodes of the anime involve the school going up against the school board for their attempts to cover up a teacher's affair with a student and their cover up of that same student's suicide to prevent the possibility that she was pregnant with the teacher's child from leaking and try to pin an attempted murder charge on Miyabi for stabbing the teacher when it is confirmed that, after hearing about his student love's suicide, the teacher tried to commit suicide as well. While the school faces being shut down as they refuse to turn over Onizuka for an (obviously fake) assault charge and Miyabi, Onizuka steps in and gets the media involved to cause a storm around the events to expose the school board's cover up. Then Onizuka takes the blame for the attempted murder despite his students having evidence that it was an attempted suicide and Miyabi finally coming around and trying to rescue him. Onizuka is nearly taken into custody but, as per the norm, he manages to escape as the teacher wakes up from his injuries. It's all but confirmed that the School Board will be unable to deny the charges of covering up the suicide and suicide attempt and all the students in class 3-4 are able to trust teachers. Onizuka goes on the run and ends up in The United States of America at a California Junior High in charge of a class full of delinquents. Sadly it's implied that Onizuka will be unable to return to Japan after this despite his role in exposing the coverup and his students and Azusa will never see him again.]]
* CargoShip: At times the only thing that seems to prevent Uchiyamada from marrying his Cresta is the unfortunate fact that it's kinda sorta... unconventional.
* CrazyAwesome: Onizuka.
* EndingFatigue: General consensus is that the manga really should have ended after the Teshigawara arc.
** If violence doesn't do the trick, more violence will. It's perfectly okay to put your colleagues' and students' life in danger when you're a teacher if there is a moral lesson behind the action. Also, some examples of Onizuka "resolving" problems of his students fall into this.
** BeYourself, [[spoiler:Tokiwa]]. When you've been gang-raped, lost your trust in the men and humanity as a whole, when you feel insecure and seen mainly as a sexual object by the opposite sex... remember that you're a girl. You can always cry. Admittedly, her own "solution" included antagonizing and beating up random men which almost made her gang-raped the second time, but still, Onizuka's response is along the lines of "you are a girl, you are weak, you are always going to be a victim, roll with it" and he does nothing to, say, bring punishment to the guys who raped her in the first place.
* FanPreferredCouple: Onizuka and Urumi, at least as far as the majority of the Western fanbase first introduced to the series through [=GTO=] is concerned. The pairing tends to get more support due to the opinion that Urumi has more of a developed personality, while Fuyutsuki too obviously fills in the role of [[SatelliteLoveInterest obligatory love interest]].
** Ayame and returning LoveInterest Shinomi from Shonan 14 days join the fray.
** Think about the last middle schooler you saw. Now picture them pregnant, living alone, and holding a job. How exactly would a disowned 13 year old rent an apartment without a credit history, raise a child by herself, and in the most expensive city in the world, all with no outside help or child services intervention? Either Japan has the world's greatest and most beneficial welfare system, she had the world's nicest landlord, or the writers are greatly exaggerating for dramatic purposes.
* GermansLoveDavidHasselhoff: GTO is loved in the US and in Europe, however Shonan Jun'ai Gumi sold better in Japan.
* KickTheSonOfABitch: The teacher Miyabi framed. Even after the reveal that she made up everything about being abused by him because he had a fiancee and she felt betrayed, Onizuka revels that he ''was'', in fact, messing around with her.
** To be fair, the teacher's fault was not heading Miyabi off even after he came to realize that she had developed a serious crush on him. Did he deserve punishment for this? Sure. Did he deserve to be framed as a child rapist, to have his entire teaching career ruined, to lose his fiancee and to get severely beaten up(twice) as a result of this? Probably not. This whole incident makes it hard to feel sorry for Miyabi.
* LesYay: Tomoko with Miyabi and Urumi.
** Kikuchi has his moments, being one of the geniuses of Class 3-4.
** He pales in comparison to Urumi though. Selling the virginity of the girls who tried to frame 'her' Onizuka to a bunch of perverts scores fairly high on the bastardry scale.
** See Urumi's [[MagnificentBastard Magnificent Bastardry]]. After her setting up three classmates (no matter how huge bitches they were) to be ''gang-raped'' by several old perverts with strange fetishes, it's hard to view her as a positive character. To a reader. In-universe she doesn't even get called out for this.
** Shonan's mayor from ''14 Days''. His debut moment? Making a policy that takes children from shelters such as White Swan, unwanted and[[=/=]or abandoned children, mind you, and taking them back to their parents who either don't want them, as is the case with Miko and Riko, or abusive monsters like Sakurako's father described above. His reason for doing this? To rack up votes from housewives.
*** Also from ''14 Days'', [[TooDumbToLive Seiya's mother]] abandoned him for her BastardBoyfriend who ''threatened to hit her if she didn't stop Seiya from hitting him and pinned the blame on her for Seiya trying to kill him over his abuse'' and did ''nothing'' to help her flesh and blood from being beat up by said boyfriend ''in front of her''. [[ParentalNeglect Riko and Miko's mother]] kept trying to get rid of them and committed suicide in the end because she didn't want to have the responsiblity to look after them and their father didn't want the responsibility either, and [[WouldHurtAChild then]] [[RapeIsASpecialKindOfEvil there's]] Sakurako's father. It all but makes Onizuka's message at the end of the Seiya arc the more powerful.
* NightmareFuel: Onizuka is mistakenly forced into a marriage with a [[http://en.wikipedia.org/wiki/Kuchisake-onna Kuchisake-Onna]]; her family share the same trait of a StepfordSmiler with saw teeth. Onizuka also encounters one in Okinawa, though it was a young girl and actually quite nice.
** Many people may not realize that GTO was an almost direct sequel to a lesser-known manga series, ''Shonan Junai Gumi.'' They most likely assumed that GTO started ''in media res'', though it could just be the fault of [=TokyoPop=] for Americans.
** ''Shonan Junai Gumi'' was marketed as ''GTO: The Early Years'' in North America and UK, but it was marketed as ''Young GTO'' in France.
** All the talk of wanting to, ahem, go with high school girls. Especially coming from the minds of [[DirtyOldMan Dirty Old Men]].
** In the manga - Pubic hair cookies. [[ItMakesSenseInContext It makes sense if you read it]].
** Onizuka's shit. [[NauseaFuel Literally]].
* TearJerker: While Onizuka is [[spoiler:dying of his GameBreakingInjury]], [[TheStoic his old Nakama Ryuji]] refuses to believe that [[spoiler:Onizuka could be hurt in any way and says that he can ''not'' die. When Onizuka's heart stops beating, he ''punches him in the chest'' hoping to wake him up, crying.]]
** In the live-action drama episode 11, Onizuka was being forced apart from his students. As he was being dragged away, he [[CasualDangerDialogue tells each of his students]] something relating to their interests (showing just how well he got to know them) or a final piece of advice.
** ''Vice-principal Uchiyamada'' sometimes gets into this territory. Chapter 107 is his greatest moment.
** Noboru fits this too. He took so much crap from Anko and her gang [[spoiler:and still saves her anyway because it was the right thing to do.]]
** Don't forget poor Tomo-chan, who gets called stupid by everyone, is manipulated by her "best friend" and who spends her time alone playing with dolls.