I would recommend 'Hawkins' Hidden Love'. This fanfic delves deep into the lives of the Stranger Things characters in a gay context. The author does a wonderful job of creating a believable story line. It has a great balance between the mystery and drama elements that are so characteristic of Stranger Things, and the exploration of the gay relationships among the characters. It's definitely worth checking out.
FanFiction.net is also a place to look. There are a number of 'gay stranger things fanfic' there. However, the quality can vary more than on AO3. But it's still worth exploring as you might come across some really interesting and unique stories.
Another theme is the coming - out stories of the characters within the Stranger Things universe. It could be about a character realizing their sexuality and how the others in the group react to it. This theme allows for a lot of character development and exploration of different relationships.
Definitely. A lot of fanfic writers have taken the character of Billy from 'Stranger Things' and created interesting gay fanfic. These can range from stories that are set within the canon of the show but with a gay twist on Billy's relationships, to completely alternate universes where his character has different backstories and relationships. You can often find these by searching for relevant tags on fanfic websites.
You can try some popular fanfic websites like Archive of Our Own (AO3). It has a large collection of fanfictions, including Stranger Things gay fanfics. Just use the search function on the site and type in relevant keywords to find what you're looking for.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics, and you can easily search for 'Stranger Things' and then narrow it down to Billy - related and gay - themed ones.
Fanfiction should generally be a creative exploration within the bounds of propriety. Gay sex fanfiction related to 'Stranger Things' is not suitable as it can be considered a form of inappropriate sexualization of the characters. The show is about mystery, friendship, and adventure, and this kind of fanfiction strays far from those themes and can make many people uncomfortable, especially those who enjoy the show for its intended values.
One great 'Stranger Things 4 Fanfic' is 'The Upside - Down Revisited'. It delves deeper into the Upside Down and how the characters interact with the new threats there. It has really good character development, especially for Eleven. Another one is 'Hawkins' New Horrors' which focuses on the town's reaction to the events of season 4 and how the community bands together or falls apart. There's also 'Beyond the Gate', which explores what might be on the other side of the gates that keep opening up in Hawkins.
There's also 'Byers Brothers' Adventure'. This fanfic follows Will and Jonathan Byers on a side adventure that wasn't shown in the show. It has great character development and a really engaging plot.
You can start by looking on fanfic platforms like Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including 'Stranger Things', and you can use the search filters to specifically look for stories about gay relationships within the 'Stranger Things' universe.