Here are some examples of gold-backed cryptocurrencies in the market:

PAXG (PAXO GOLD) https://paxos.com/paxgold/

BXG (BITXGOLD) https://bitx.gold/

GLC (GOLDCOIN) https://goldcoin.com/

PMGT https://pmgt.io/

XAUT (Teather Gold) https://bitx.gold/