You can try looking on popular fanfic websites such as Archive of Our Own (AO3). It has a large collection of fanfictions, and there's a good chance you'll find a Gabriel x Vinette fanfic there. Just use the search bar and type in the relevant tags like 'Gabriel Dropout', 'Gabriel x Vinette' and see what pops up.
A good fanfic in this pairing often has well - developed characterizations. It should capture the essence of Gabriel and Vinette's personalities as seen in the original series. For instance, Gabriel's lazy - yet - secretly - caring nature and Vinette's sweet and somewhat naive personality.
One of his best novels is 'One Hundred Years of Solitude'. It's a masterpiece that weaves a complex web of family history, time, and magic realism. The Buendía family's story over generations is both captivating and thought - provoking.
Negan doesn't kill Gabriel in the comic series. The fates of these two characters don't play out like that. Gabriel's story continues independently of any interaction with Negan resulting in his death.