The Gold Keys are used to open chests which give golden items, like golden saws and more items. In the Family Island game, you can get Gold Key in six different ways.
- Completing merchant chain of orders.
- Receive Gold Key as a reward for competing in different events.
- Purchase as a part of special offers from Family Island game.
- Get Gold Key as a day 7 reward in Reward Calendar.
- Complete levels and get Gold Key as a bonus rewards.
- Gold Key sometime hidden in the rock and available on remove rock.
In simple words, you can get Gold Key in Family Island by completing merchant orders, from different events and by purchasing special offers in game.