Hi!
For those having problems updating Gwent:
If you had Gwent installed via GOG Galaxy, Just access GOG Galaxy, let it update itself, and inside GOG Galaxy you MUST unnisntall Gwent. If you try to update the old one, it wil give you a server errror. Once you have unninstalled Gwent, Install it. Thats what I did, its downloading right now via GOG Galaxy. Once it finishes and I enter game I will update my post. Btw, I have several partitions in my disk, GOG Galaxy is installed in partition F (where I Install all programs) and Gwent is being installed in partition D (where I install all games).
Gl everyone!