This guide will let you know how to complete the Bounties, and get the Gold in Fortnite.
First, you will need to activate the quest by finding a character around the map, as shown in the image below.
When you get to this location you will find a character, talk to him, and then he will offer you the quest. You will find the third quest which is a bounty quest.
After that, you have to kill some other enemy players; you need to complete five of those to complete your challenge.