Perhaps Percy goes back to Goode to find a sense of normalcy. He might try to participate in school activities like sports or clubs. However, his past as a demigod will surely follow him. His powers could accidentally surface during a school event, causing chaos and confusion among his classmates. He'd then have to figure out how to cover it up while also protecting those around him from any potential danger.
In this fanfiction, perhaps Percy will make new friends at Goode who end up getting involved in his demigod world. There could be a plot where the school is in danger, and Percy has to use his powers and knowledge of the mythological world to protect it. Maybe he'll also have some interesting interactions with his teachers who suspect there's something different about him.
There could be a new bully at Goode who targets Percy because he senses Percy is different. This bully might turn out to have some connection to the mythological world, like being a descendant of a minor god.
Well, in the Percy Jackson books, there's no mention of Percy Jackson Goode reading Percy fanfiction. Fanfiction is more of an outside - the - official - story thing created by fans. It's not really part of the main plot or something the characters would typically be involved in. So, it's very likely that he doesn't read it.
One common theme is the struggle to fit in. Percy is a demigod in a normal high school, so he has to hide his true identity while also trying to be like the other students. Another theme is friendship. He often forms new friendships at Goode and has to navigate how those relationships work with his demigod life.
There's a good chance he'll meet the goddess Athena. Since Percy has a connection to the world of the gods, and Athena is known for her wisdom and strategic thinking, she could offer Percy some valuable advice. Maybe she'd help him navigate the complex social and political situations in ancient Greece or teach him some new ways to use his demigod powers.
In this fanfiction, Percy might struggle to catch up with the school work he missed. There could also be some sort of rivalry or conflict with a new student. And perhaps he'll discover a hidden part of the school that has some special significance related to his past adventures.
It's possible that they have an adventure related to a school project gone wrong. For example, if they are doing a project on Greek mythology and accidentally summon a minor deity or a mythical creature. Then they have to figure out how to send it back without causing chaos in the school and also keep it a secret from the regular students.