There may be some 'yugioh gay lemon fanfic' out there, but it's not likely to be widely popular in the general yugioh fan community. The yugioh franchise is mainly known for its card game and anime with a focus on duels, magic, and the official story arcs. Fanfics with gay relationships and 'lemon' elements are more of a sub - genre within the fanfic world for yugioh. They might be popular within a very small subset of fans who are interested in exploring such alternative and often more adult - themed interpretations of the yugioh universe, but not something that has broad appeal across the entire fanbase.
It's difficult to say if there are popular 'yugioh gay lemon fanfic' stories. Since this involves a rather niche area of fan creation that combines homosexuality and what might be considered more mature themes. The official Yu - Gi - Oh fanbase is quite large and diverse, but this particular type of fanfic might not gain as much widespread popularity as fanfics that stick closer to the official plot and characters without the added 'gay lemon' elements. It could exist in some smaller, more specialized fanfic communities, but not be well - known on a large scale.
I'm not aware of any specifically popular 'yugioh gay lemon fanfic' stories. This type of fanfic may not be as mainstream due to its combination of non - traditional relationship themes and potentially inappropriate content. Also, much of the Yu - Gi - Oh fan community may focus more on the official storylines, card battles, and canon relationships.