Is there a way to modden money in gta online on xbox one?
Yes of course there's
Probably yes, although I don't know any.
That being said, it's nothing like cheating in an online game! Not only is this unfair to all other normal players, it also violates Rockstar's guidelines.
So I hope you, if you make use of it, like everyone else will be permanently banned from the game.
Have fun