I hate to be the bearer of bad news but I can't reveal anything since he's not my character :')
Whatever Gnome decides to reveal from his past is the only thing i'm allowed to show so you'd be better off asking them on their tumblr- but they also don't want a lot about him out so most of what is publicly known is already available ! (their blog: https://hatchetmanofficial.tumblr.com/ )