Obviously, Zach and the girl would be the main characters. Zach could be a confident, good - looking guy who is used to getting his way with women. The girl could be an independent and intelligent character who is initially intrigued by Zach's charm.
Another plot could be that Zach is a player in the sports world and the girl is a journalist covering his games. She's supposed to be objective but finds herself falling for him. Zach, on the other hand, has to deal with his playboy reputation while trying to win her over.
One idea could be that Zach and Cammie are on a secret mission together in a foreign country. They have to pretend to be a couple to blend in and gather intelligence. Along the way, they face many challenges that test their relationship and spy skills.
In some fanfictions, their relationship might develop because of a common interest outside of spying. Say they both discover a love for a certain type of art or literature. This gives them a different side of their relationship to explore, away from the world of espionage.
In some fanfictions, the player Zachs might be in a sports team and the girl is a big fan of the team. She catches his eye, and he tries to pursue her while also dealing with his reputation as a player. This scenario can lead to some interesting stories of self - discovery for Zachs as he tries to be worthy of her.
Fanfiction.net is also a great place to look. There are many different categories and tags. Just make sure to filter through the results to find the ones specifically about Gallagher Zachs and the player - girl concept. Sometimes, you might need to look through related tags as well if the exact search doesn't yield many results.
Another idea is that there's a new threat to the Gallagher Academy, and Cammie and Zach are the only ones who suspect it. They start their own investigation, which takes them on a wild adventure across different countries. Along the way, they encounter old enemies and make new allies, all while trying to figure out who is behind this new threat and how to stop it.
Their relationship could develop uniquely if they had to go through a trust - building exercise that was really extreme. Like being locked in a room with a ticking time bomb and they have to disarm it together while sharing their deepest fears. This would bring them closer in a very intense way.
One common theme is friendship. Just like in the original series, the fanfictions often explore the deep bonds between the Gallagher Girls. They face challenges together and support each other through thick and thin.
Some Gallagher Girl fanfiction stories revolve around time - travel. Imagine a character going back in time to change an event that had a major impact on the Gallagher Academy. It could be a story full of mystery and adventure as they try to fix things without disrupting the whole timeline. There are also those that focus on the romances in the Gallagher Girl world. For example, a story about two characters who are from different 'cliques' within the school falling in love and having to deal with the challenges that come with it.