Unlocking the secret gnome door in Fortnite requires completing specific tasks or challenges during gameplay, typically associated with a particular season or event within the game. These challenges may involve completing certain objectives, finding hidden items, or accomplishing specific actions within a given time frame. Once players complete the required tasks, they will gain access to the secret gnome door. Behind this door, there may be additional rewards, Easter eggs, or story elements that add depth to the Fortnite experience. Each season brings new secrets and challenges, so players should pay attention to updates and events announced by the developers to uncover these hidden treasures.