Gabe would probably be very intimidated at first. Demigods have powers and abilities that are far beyond what he's used to. He might act tough at the start to hide his fear, but as he sees more of what they can do, he could become more submissive or try to make friends with them out of self - preservation.
Gabe's reaction could be a mix of disbelief and envy. He might not believe that these demigods exist and have such amazing powers. And he could be envious of their abilities and the community they have at Camp Half - Blood. He might start causing trouble, trying to disrupt their harmony, because he feels left out or inferior. But over time, if the demigods show him kindness, he could change his attitude and start to respect them.
One possible plot could be that Gabe stumbles upon Camp Half - Blood by accident. He might initially be scared but then try to take advantage of the situation. The demigods at the camp would be suspicious of him and his motives. They could try to keep him away from any secrets or magic items in the camp.
Well, in a Poseidon meets Gabe fanfiction, it could be an epic encounter. Maybe Poseidon, the powerful sea god, comes across Gabe in a coastal town. Gabe could be a fisherman or some kind of local character. Poseidon might test Gabe's courage or kindness towards the sea. It could lead to a story where Gabe has to prove himself to the god of the sea.
Some would be very curious. They've probably never seen someone like Harry before. Others might be a bit skeptical, wondering what his intentions are.
Percy could gradually become more defiant. As the abuse continues, he might start to realize that he can't just take it. He could start to fight back in small ways, like talking back or refusing to do certain things Gabe demands. But this would also make him more fearful of the consequences. And in the long run, he might find the courage to fully oppose Gabe, either on his own or with the help of others.
Perhaps Gabe is an artist who loves to paint the sea. Poseidon, noticing Gabe's passion for the ocean through his art, decides to visit him in his dreams. In these dreams, Poseidon shows Gabe the hidden beauty and power of the underwater world that he has never seen before. This experience changes Gabe's art and his perspective on the sea forever.
There would also be those who are angry. Some of the campers who have always been a bit jealous of Percy's status might think he's just being selfish or irresponsible. But deep down, they'd also be a bit concerned for his well - being, even if they don't show it at first.
Reyna from Camp Jupiter would also be a great character to focus on. She's strong, intelligent, and has a lot of leadership experience. In a fanfiction where the two camps meet, she could represent the Roman side well, and her interactions with the Greek demigods would be full of potential for conflict and cooperation. For example, she might initially be skeptical of the more laid - back Greek approach to things, but come to appreciate it as they work together.
Naruto would probably fit in by being his energetic self. His determination would make him a great camper.
Percy might be initially confused. He's not always the most attuned to flirting, so he could just stare at Drew blankly for a moment.
Gabe probably starts with a rough sketch, outlining the basic composition and characters. Then, he adds details and fine lines to make it look more polished.