We're not talking about 'doing well'. We're talking about a Gamer trying his best and not holding back whatsoever.
Wrong due to several reasons
1. You can't get more than an A+ in highschool
2. We are not your typical gamer, we have a cap on our attributes
3. QM said
Attend school and try to excel, spend your free time when not training, doing homework and grinding that Intellect to achieve great academic results
The only specified methods are "do your homework" and "grind int" (which increase our memorizing ability). Grinding that int cuts down on how much time and effort we need to put into stuff to memorize it, but literally nobody knows how much time we spent doing the homework so nobody will notice our higher int (it is also hard capped unless we murder stuff for XP).
4. Highschool teachers are not part of the secret police
5. Highschool teachers are not going to go apeshit at a student suddenly raising his grades.
6. Getting all As in highschool is not the sign of great massive towering intellect like you think it is.
7. You are talking out of your ass in platitudes. We are now in highschool, lets say our classes are
Class - Grade
Art - B
Math - A
Geography - C
Geometry - B
History - C
So our "excelling" would be doing all the homework and doing better on tests. This would slowly over time raise our grade closer to all As (since scores are averaged). This is not a sign of someone having superhuman ability. This is not a sign of genius. And being a genius is certainly not a sign of being "suspicious".
You're completely ignoring our insane advancement rate for skills.
Because they are completely and utterly totally irrelevant to the discussion. Nobody is going to say "holy shit this kid is as good at math as someone with a PHD in math", they are going to say "oh nice, timmy is now doing his homework and raised his grade from a B to an A, good for him" assuming they even notice at all. (fun fact, each highschool teacher has to deal with over 100 students, and since they have computers they are not even keeping track of them all, just inputting grades in the computer as they come up).
Heuristics software that looks for sudden grade improvement is also completely and utterly stupid because again, highschool students improve their grades all the time. it just takes a parent to crack the whip and make them do their homework.