Its not a breeder or seedbank, clone only strains are only available as clones. Mostly they are special selected phenotypes of a commercial strain, or old classics who was keeped by someone somewhere...
There is a big hype and also a lots of myths about the Girl Scout Cookies. Many people think the strain is a hybrid of the Cherry Pie (Cherry Kush) and also have some GDP in the lineage - but probably GSC have nothing to do with this strains and it's simply a South Florida OG Kush x F1 Durban hybrid. It's not a big yielder, but strong and tasty. Flowering around 9 - 10 weeks.