Since it's a fanfiction, it could be set in the world of an existing story or show. Maybe Gilbert is a character who has no medical training but has to step up and deliver a baby. It could also involve other characters from the original source, like his friends or family helping him through this nerve - wracking situation.
Gilbert is the key figure here, but we can assume there will be other characters to support the story. There could be a panicked father waiting outside, or a helpful neighbor who brings in supplies while Gilbert is trying to deliver the baby. The mother, of course, is a crucial character as she is going through the labor process. And depending on the context of the fanfiction, there might be some sort of antagonist, like a natural disaster or a lack of proper medical equipment that Gilbert has to overcome.
One popular baby Gilbert fanfiction could be those that focus on his early days and his interactions with the family. For example, stories might depict his first steps or his first words within the family setting.
Marilla could be considered as a godmother. She has been like a mother to Anne and would surely be a great influence on the baby. For a godfather, perhaps one of Gilbert's close friends from school. Someone who is responsible and shares Gilbert's values, like his friend who was also interested in medicine and could pass on good work ethics to the baby.
You need to create a vivid setting for the story. If it's set in his home, describe the nursery, the toys around him. Also, think about the emotions of the people around him. His parents' love and pride can be important elements to include. You can write about how they coo over him when he smiles.
Yes, there are quite a few out there. You can start by checking fanfiction websites like Archive of Our Own. There might be some heartwarming stories where Gilbert plays a significant role in the birth of Anne's baby.
One idea could be that the baby has an extraordinary talent from a very young age, like being able to communicate with animals just like Anne used to. Another could be that the baby's birth brings the community closer together, with everyone pitching in to help Anne and Gilbert. Maybe the baby has a special connection to nature that is both a wonder and a bit of a challenge for Anne and Gilbert to understand.
One possible plot could be that they face many challenges in protecting their baby from the supernatural threats in their world. For example, vampires or werewolves might see the baby as a target or a powerful tool. They would have to use their combined powers and the support of their friends to keep the baby safe.
We can expect a lot of emotion. It could be a story full of love and anticipation as Gilbert helps bring their new baby into the world. There might be some tense moments during the delivery process as well.