OG Kush x Durban Poison THCa: 18.70% Delta 9-THC: 0.226% Girl Scout Cookies, often abbreviated as GSC, is a well known and popular strain of cannabis reputed to have high THC and moderate levels of THCA. GSC is noted for its sweet and earthy aroma and flavor, and is believed to have potential effects that include euphoria, relaxation, and pain relief. It is a hybrid strain that is believed to be a cross between Durban Poison, a sativa, and OG Kush, an indica.