ATL trap music icon Gucci Mane will put out a new mixtape next week, and today he released the title cut, "I'm Up," a lurching Drummer Boy production that features the ubiquitous 2 Chainz. Drumma Boy gives these dudes a softball -- it's unspectacular in the sense that it's one of those "right-in-the-wheelhouse" tracks that Gucci Mane has earned a ...