Gambit is usually considered a work of fiction. It might draw inspiration from various sources, but it doesn't represent real events or people in a direct way.
The origin story makes Gambit a complex character. His upbringing in the Thieves' Guild gave him a sense of survival and cunning. His mutant power also made him different from others in the guild, which could lead to both envy and respect. This origin shapes his character as someone who is always on the edge, not fully trusted by some but respected for his skills.
Some characters might develop their gambit powers through intense training. Just like in the original Naruto series where characters train hard to master their ninjutsu, in fanfiction, they could push their limits in special training regimens to unlock new aspects of their gambit powers.
Queen of Gambit is not based on a true story. It's a work of fiction that was crafted to engage and captivate the audience with an interesting plot and characters.