I'm not sure specifically what 'gahn horror stories' are. It could be some local or very niche horror stories. Maybe they are from a particular region or community that uses the term 'gahn' in a unique way.
Well, it's difficult to say whether there is such a fanfic. Fanfic writers come up with all sorts of creative ideas, but this particular combination of Martian Manhunter and M Gahn in a pregnancy - related story might not be very common. There are so many different fanfic universes and themes out there. It could be that someone has written it, but it might also be that no one has thought of it yet or it's just not popular enough to be easily found.
It could be about how they deal with the unexpected pregnancy. Maybe they face challenges from their respective communities or families. Or it could explore the unique biology of Martian Manhunter in relation to the pregnancy if he is the one carrying the child.
One horror story could be about a haunted house. In the story, a family moves into an old mansion. Strange noises start at night, like creaking floorboards and whispering voices. They soon discover that the previous owner was a witch who cursed the place.
One could be about a haunted house where strange noises and apparitions terrify the inhabitants. Another might involve a cursed object that brings misfortune to whoever possesses it. And there could be a story of a vengeful spirit that haunts a particular place due to a past injustice.
Perhaps there's a story about a cursed object. It might be a doll that seems to have a life of its own. In the '49 horror stories', this doll could cause misfortune to those around it. It moves when no one is looking and gives people nightmares just by being in the same room.
Well, in 'the dream team horror stories', it might be that the team had to deal with some unethical practices that turned into horror stories. Say, they were involved in a project where they found out the client was using their work for illegal activities. This discovery led to a lot of trouble for the team, including legal threats and a damaged public image.
One possible horror story could be about a bachelor who moves into a new apartment only to find that strange noises keep him up at night. Every time he tries to investigate, he sees fleeting shadows. It turns out an old tenant had died mysteriously in the apartment and their spirit was still lingering.
I'm not sure specifically about the horror stories in 'gma 7 true horror stories' as I haven't directly experienced them. But generally, true horror stories often involve elements like haunted places, strange apparitions, or unexplained events that terrify people.