Gbk also known as (Gangster Block Kartel) and are mostly associated with "Bloods" and run most of Roblox hood games and one of the most nitrous gangs in roblox.
Gbk 1: Aye blood what you on?
Gbk 2: Bhillin
Gbk 1: there go 12 (yells) GBK ! GANG SHIT NIGGA