Level 29 in the Chapter 2 Season 4 Battle Pass is required to get this

How to Get the Fortnite Gamma Overload Emote? The Fortnite Gamma Overload Emote was available in the Chapter 2 Season 4 Battle Pass. In order to unlock it you needed to reach Level 29 in the Chapter 2 Season 4 Battle Pass. Sadly It is unlikely that you will be able to get this item anywhere else if you missed the Battle Pass from this specific season.