CD PROJEKT RED announced the release date of the Japanese version Gwent: The Witcher Card Game. The game will be available from May 24, 2017 which is TCG based on the Witcher series, similar as the Shadowverse or the Hearthstone. According to the press release the game will be available from the GOG.com, PlayStation Store and Xbox Store.
Like any other TCG games, the Gwent will be a basic free to play title.