Gangster Killer Bloods of South Carolina The Gangsta Killer Bloods are terrorizing Columbia, South Carolina. Known as the GKB's, they dominate the crack cocaine trade here. The Gangsta Killer Blood's have spread like a cancer through the streets of the city. They battle rivals like the Folk Nation in an all-out war where public shootouts are commonplace. Thanks to the GKB's, South Carolina remains the bloody South.