As Invincible already stated, GCG must be imported from abroad. I have been planning to order Julia's herbal combinations for some time, but the postage is rather costly... So, I chose the following instead:
Chanca piedra is used to dissolve gallstones, as well as kidney stones, and can be used as preparation to the liver flush. I have been taking the tincture for some days now and have felt a number of odd sensations in the liver/gallbladder region, so it is surely doing its great work. I hope to reap the rewards come Monday, when next I flush.
More information on chanca piedra can be found here: