The Witcher 3’s popular mini card game the Gwent going to release as a standalone title in the near future on Xbox One and Windows 10. The release date of the game not clear BUT you can try the open beta version from 2016 September.
The game going to supports the cross play feature so the Windows and Xbox One users can play together without any limitations! On the official website of the game you can register for the open beta test! More information coming soon! Stay tuned.