The description of the game in the App Store does not mention the binding of an existing Gvint account to the mobile version, so it is not yet clear whether it will be possible to transfer your progress to it from a PC and consoles.
Earlier, CD Projekt Red announced that Gwent: The Witcher Card Game, which was released on PC, PS4 and Xbox One, will also appear on mobile platforms, first visiting iOS in 2019. There are no details about the Android version yet.
Gwint is a card strategy in the Witcher universe. The early version was available inside The Witcher 3 as a mini-game, but later the authors made it a separate title, significantly rebuilding the mechanics.