To make a good FNAF comic, you should study the source material thoroughly. Understand the lore and the atmosphere. Good art skills are essential for bringing the scenes to life. And don't forget to add some twists to keep the readers engaged.
One way to make a scary story is to start with a spooky setting, like an old, abandoned house on a dark and stormy night. Then, introduce a strange character, perhaps a shadowy figure that seems to lurk in the corners. Build up the suspense by having unexplained noises or events occur, like creaking floors or sudden cold drafts. For example, you could write about a young girl who ventures into the old house and starts to feel like she's being watched. As she explores further, she finds a locked room and hears a faint crying from inside. This will keep the readers on the edge of their seats.
In a particular FNAF story, a group of kids dared each other to spend the night in the abandoned pizzeria. As the night fell, strange noises started. The animatronics that were left there in a dilapidated state began to activate one by one. The kids realized they were in real danger as the animatronics moved towards them with an unnatural speed. They tried to find a way out but the place was like a maze, and they were constantly being chased by the terrifying animatronics.
I'm not aware of any official connection between GTA 5 and FNAF in terms of scary stories. GTA 5 has its own dark and gritty stories, and FNAF has its own spooky lore, but they are from different franchises and not typically combined in that way.
Well, making a scary story good involves creating a sense of mystery. Don't reveal everything at once. And make the readers care about the characters so they feel more invested in what happens to them. Also, a good scary story often plays on common fears.