User blog comment:Facetheslayer/Joint Ops: Round 11: Leone Mafia (GTA 3 + LCS) vs. Grove Street Families (GTA: San Andreas)/@comment-3166030-20110303212334/@comment-3166030-20110306044638

Nope, Sweet is the older brother of the two, and stayed in the Grove, whereas, CJ ran off to Liberty City after Brian's death. Therefore, concluding Sweet as the leader of the GSF.