Well, one possible plot development could be that Gajeel is initially shocked but then overjoyed. He might start making plans right away, like preparing a nursery for the baby. Another could be that they face some difficulties, for example, they might worry about how their guild mates will react. And also, Levy could have some concerns about how her pregnancy will affect her magic abilities and her role in the guild.
There might be emotional challenges too. Levy could be worried about how motherhood will change her life and if she'll be a good mother. Gajeel may also struggle with his own insecurities about being a father.
He'd probably be stunned at first. Just stand there with his mouth open a bit. Then, he'd break into a big grin and hug Levy tightly.
Gajeel might be initially shocked. He could then feel a rush of joy and immediately start planning for the future, like thinking about how to make a safe and happy home for the baby.
In this fanfiction, perhaps it's an accidental pregnancy. Gajeel and Levy are in the middle of a big adventure together when they realize that Levy is with child. They then have to quickly return to the guild. The guild members have mixed reactions. Some are very happy for them and offer support, while others are worried about how it will impact the two as mages. Gajeel has to learn how to be more gentle and understanding, and Levy has to adjust to the physical and emotional changes that come with pregnancy.
One common theme is the couple's anticipation. They're often shown eagerly waiting for the baby's arrival, like in many fanfics where Levy is constantly reading pregnancy books and Gajeel is trying to build things for the baby.
One possible plot twist could be that Levy discovers she has some special magical ability that is enhanced during her pregnancy. This newfound power could attract unwanted attention from dark mages who want to use it for their own gain. Gajeel would then have to go to great lengths to protect Levy and their unborn child.
One possible plot development could be that Gajeel and Levy initially struggle with the news. Gajeel might worry about being a good father as he has a tough exterior. Levy could be nervous but also excited. They would then start preparing for the baby, like finding a proper place to live. Their friends in the guild would support them, and there could be some comical moments when the guild members try to give parenting advice.
Their friends would probably be very excited. The other Fairy Tail members might throw a big celebration for them. Some of the female members, like Lucy, would be super helpful to Levy, giving her advice on pregnancy and helping her with things like shopping for baby clothes.
Yes, there might be such fanfics in the Fairy Tail fanfic community. However, not all of them are easy to find. Some fanfic platforms might have specific search filters that can help you locate them.
A possible plot could be that Gajeel and Levy go on a journey to find a special place to raise their child. Along the way, they encounter old enemies who now see the pregnant Levy as an easy target. But they fight together, with Gajeel being extra protective. Also, they could have different ideas about parenting. Levy might want a more studious and peaceful upbringing for the baby, while Gajeel wants to train the baby to be tough from a young age. They then have to find a middle ground.