Gemini is one of the series of skins released under the Zodiac Monthly Deal. It was available for purchase in the middle of May 2017.
Gemini could be purchased for $4.99 as part of the Star Pack offer. A package of either 7000 coins (Browser) or 800 DNA (Mobile) was also included with this skin. Gemini was not available for individual purchase and may not be available for purchase in the future.
Details of this offer may vary depending on location and platform.