IT'S A FUCKING SONG THAT KEEPS ONE SAYING "GUCCI GANG" LIKE STOP BITCH.
Ignore all the other definitions. Gucci Gang is basically Lil Pump and Smokepurpp as a duo. Often said in Smokepurpp's songs (phantom etc.)
"For the gang bitch it's Gucci Gang, and we blowin brains (gang, gang, gang)"Bless Yo Trap-Smokepurpp