I'm not entirely sure specifically what the 'gorgon city story' is about as it could be a very specific or even a made - up story. It might be related to a place named Gorgon City in some fictional context, or perhaps it's a story with a character or event that has the name 'Gorgon' in it.
In the story of Macbeth, the old gorgon was believed to be the manifestation of evil and fate. The witches' prophecies and their mysterious presence drove Macbeth to his downfall.
In the 'gorgon city story', the main characters could be a diverse group. There might be a young journalist who is trying to uncover the truth about the city. There could also be an old wise man who knows the ancient secrets of Gorgon City and guides the younger characters. And there may be a group of rebels who are fighting against an unjust regime in the city.
Well, Medusa was a Gorgon. She used to be really pretty. However, things changed when she got cursed. As a Gorgon, she had this terrifying power to turn people to stone just by them looking at her. Perseus was the hero who had to deal with her. He was super clever. He used a shield like a mirror so he could see her reflection instead of looking at her straight on. Then he chopped off her head and that was a big part of the story.
In some Harry Potter fanfiction, the Gorgon could be introduced in a unique way. For example, it might be a hidden creature in the Forbidden Forest. And the lemon, which might not be the fruit but a term for mild romantic or sensual content in fanfic terms, could be used to add a touch of drama or relationship development. Maybe a character has an encounter with a Gorgon that leads to a situation where the lemon - like romantic tension - starts to build with another character.
Power struggles are likely a common theme. Given it's a 'war' in the title, there would probably be stories about different factions vying for control in the world of Gorgon. Another could be heroism, with characters rising up to face challenges during the war.
One idea could be that Harry's gorgon abilities lead to him accidentally turning some of his friends to stone during a Quidditch match. Maybe his hair gets out of control and the glare from the sun causes the transformation.
Hermione could be a main character. She might be the one who helps Harry understand and control his gorgon powers. For example, she could research in the library to find ancient spells or potions that can suppress the gorgon - like effects when they are unwanted.