One popular 'female gon freecs fanfiction' story could be about her adventures in a new and unexplored area of the 'Hunter x Hunter' world. It might involve her making new friends and facing unique challenges.
The themes could include the journey of them coming to terms with their feelings for each other. Also, the idea of Ging's past and how it affects their relationship with Gon could be a major theme. There might also be themes about how their relationship impacts the world around them in the Hunter x Hunter universe.
I'm not sure specifically which Ging meets Gon in a 'boyfriend' context fanfictions are out there. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net. Just type in relevant keywords and browse through the results.
Some popular themes could be friendship. In many fanfictions, Gon and Fem Killua might have adventures together that strengthen their bond. Another theme could be self - discovery. As they face different challenges, they learn more about themselves. Also, there could be themes of family, especially considering Killua's complex family situation in the original story.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and there's a good chance you'll find some great 'female gon freecs fanfiction' there.
One plot idea could be a story where they team up for a special mission in a new, mysterious land. They face unique challenges that test their friendship and skills. Another could be a time - travel story where they go back to important moments in their pasts and change small things that have big impacts on their relationship.
For Killua, you could explore his fear of losing Female Gon more deeply. Maybe he has nightmares about it, which makes him train even harder to protect her. For Female Gon, you could develop her sense of femininity in a world of mostly male Hunters. She could start wearing more feminine Hunter gear but still be as tough as ever.
You can try fanfiction.net. It has a large collection of fanfictions related to various anime and manga, including ones about Gon and Fem Killua. Another option is Archive of Our Own (AO3). It has a wide range of fan - created content, and you can easily search for the specific Gon and Fem Killua fanfictions you're interested in.