I was going through my collection of Gucci tapes and found that I have about 20. I'm not sure whether they are official or not, but they are all good. Many of them have the same tracks, but different DJ's. A few mixtapes that I'm feeling at the moment are "Burrprint 3d" and "From Zone 6 To Duval." Both of them have tons of gutta ish by Gucci.
I keep looking for more tapes because I hear that there are tons more out there, or at least that's what my peoples tell me. I found some Gucci Mane mixtapes at a fansite and then some more on Datpiff.com, but I was wondering where to go for any more.