Yes, Monopoly Go lets you trade gold cards, but only during special events like the Golden Blitz. These events allow players to trade specific gold stickers designated for that event.
During the Golden Blitz, players can exchange their gold stickers with others. However, only the specific gold stickers for that event can be traded.
All other gold stickers are not eligible for trade outside these special events. This makes the Golden Blitz a unique opportunity for trading.
Participating in these events can help you complete your collection faster. Be sure to keep an eye out for when the Golden Blitz is active!