Kimmy Schmidt is purely fictional. The show was crafted by writers to bring humor and unique storylines to the audience, not based on real events or people.
You can start by looking on fanfiction platforms like Archive of Our Own. Just search for 'New Girl Schmidt gay' and you'll likely find a variety of stories.
Cece and Schmidt have a really cute love story. They started as friends but there was always an underlying attraction. They had many ups and downs. For example, they faced issues related to their different backgrounds and career aspirations. But their love prevailed. They shared many sweet moments like their first date which was filled with nervousness and excitement. Eventually, they overcame all the obstacles and got together, which made everyone around them happy.
No. Writing fanfic involving sexual content related to a character is not appropriate. It violates the boundaries of respect for the character and the show. It also may not be in line with ethical and moral standards, not to mention it could potentially be against the rules if the fanfic were to be shared in certain platforms.
I'm not entirely sure which 'Kimmy Schmidt' you specifically refer to. There could be many people with this name. If you mean the character from 'Unbreakable Kimmy Schmidt', it's a fictional story about a woman who was rescued from a doomsday cult and tries to start a new life in New York City.
There are many fanfictions exploring Schmidt's character in a gay context within the 'New Girl' universe. Some might focus on how his relationships with other male characters could develop in an alternate scenario, perhaps his bromance with Nick taking on a different, more romantic undertone.