So, Gerson is nicknamed the Hammer of Justice. Do you know what else can be considered a hammer of Justice? A judge's gavel. It is a type of hammer that can bring justice. So that means Gerson used to be a judge in the Hometown City Hall or something and his hammer is a gavel.
I like this theory
very good 
just now i realized hometown doesnt have a court or anything, just the police. seems pretty authoritary
Or he was a carpenter.
Yeah I deserve that
Gerson was a writer and teacher, also a smith
burrito
triality of deltarotkind
HOLY SHIT
or he was a blacksmith 
