Nigga, public assistance housing, mice all up in your closet
Keeping it G ain't bout where you from, it's about where you gon' be

from Danny Brown – Shouldn't Of Lyrics on Rap Genius

Meaning

He is explaining the conditions of where he grew up and is explaining that there is nothing cool (G) about living in those situations, so by moving out of that situation to better his life if he is able is the cool thing to do

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