Other than the ETF symbol GLD on the American Exchange I am not aware of any.
A lot of the (smaller ) gold bullion sales are done through coin dealers ( at least in the US) . Gold bullion coins such as Maple Leafs, Eagles, Pandas, etc are done through these venues...Engelhard, Johnson Matthey. Credit Suisse also handle their own sales of bullion
I'm not sure how the commodities market records and publishes their sales