They was B.Gs, not it's just New Breeds. Here's an episode from Vice on Chicago gang violence: http://youtu.be/W0HZZtTtq_E
As you can see the members refer to themselves as New Breed not BGs nor New Breed BGs. By the way the Vill location wasn't Southside but Westside.

If you think you are too small to make a difference, you haven't spend the night with a mosquito.
- African Proverb