Gabi is still alive in the AOT manga. Her fate was determined by the plot and the author's choices, and death wasn't one of them for her in this particular storyline.
Love and friendship is a big theme as well. Their relationship can be seen as a deep friendship that has the potential to turn into love. Fanfics explore different aspects of this, from the awkward first moments of realizing there are deeper feelings, to the more mature and stable relationship they could have in the future.
One popular Gabi x Falco fanfiction might be those that explore their post - war relationship. In some stories, they work together to rebuild their world. For example, there could be a story where they start a new community for the survivors of the war, facing various challenges along the way like resource management and dealing with the trauma of the past.
One popular Gabi x Falco fanfic is 'The Journey of Gabi and Falco'. It beautifully depicts their relationship development in a post - war setting. The story shows how they support each other through the challenges of rebuilding their lives and dealing with the traumas of war.
You should also create a vivid setting. If it's set in their war - torn world, describe the destruction and how it affects their daily lives. This can add depth to their relationship. For instance, they might find comfort in each other in the midst of chaos. Additionally, use dialogue that sounds natural to them. Gabi would be more forceful in her speech, while Falco would be more measured.
It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
Gabi remains alive in the manga. The plot doesn't lead to her death. It's one of those character arcs where she continues on despite facing various challenges.
There could be various fanfictions. Maybe some that focus on alternative endings, like ones where certain characters survive who didn't in the original. For example, a fanfiction where Erwin survives and leads the Scouts in a different way.