Sadly, everything has an end, and that includes Gwent console support. Starting from Monday, the game will no longer be updated on PS4 and Xbox One. Real-life money will also no longer be supported either.
If you wish to continue receiving updates and spend real money, you will have the option to transfer your account to a PC or mobile platform. You will need a GOG account to do that, though, and the transfer needs to be initiated before the official end date next year (June 9, 2020). Don't rush though, you have six months to complete the transfer, but it's one thing you need to have in mind.
CD Projekt Red explained that they can no longer "support a growing number of different versions of Gwent while improving feature parity between them". Seeing that the game will soon arrive to mobile platforms as well, the decision is perfectly normal, understandable, and rational.
Gwent: The Witcher Card Game is currently available on PS4, Xbox One, and PC.