Buying real gold use bitcoin gold is not new adoption, compared by other like JM bullion etc. one gold app still small platform, but its good oportunity to all bitcoin user to buy at this platform, anyway you also can buy gold by bitcoin in some other site here the reference:
https://www.buybitcoinworldwide.com/buy-gold/bitcoin/
https://www.smartbitcoininvestments.com/buy-gold-with-bitcoin/