Hello,
PGG is a crypto asset issued by Puregold that uses the current price of gold set on the LBMA exchange at the time of swap. PGT is a utility token issued by Puregold to be used to pay or offset transaction fees on the Gold-Commerce platform. PGT can be converted to PGG at a rate announced by Puregold at that point in time. PGT holders can also be rewarded with PGG by Puregold, in proportion to the amount of PGT they hold.