1g of gold in goldtoken is equal to 51,95$ - based on this chart
I'd go by the buy prices of GOLD and Bitcoin; it could be more accurate since the graph
may be a median. (That's something only GOLD team can tell).
So if I buy 1 GOLD for bitcoin
at the official marketplace it costs 0.00820182
BTC, which means about 53.02 USD.
A bit bigger than 51.95. And I guess that the market will adjust in time.