Being, or looking, so rad that others only naturally assume you must be in some way related to a gang. Originated back in 1830 when an Emily Dickens was born. Most know Miss Dickens from her poetry and books, but back in the day she was known world-wide for being gang related. Today her ancestors live on as, the "Gang Related".
"Man! Have you seen Emily today?"
"She be looking so rad, she must be gang related!"