Hello all, I wanted to ask if there was any Linux Support yet for the Galaxy Client.

'in progress' status has been lying for 5 years and it continues by now. GOG doesn't care about Linux and its users, which is obvious when you see how people being ignored for years.
This is the reason why I still love Steam and thinking about pre-purchase Cyberpunk 2077 exactly in there. Steam strongly supports Linux with Proton and made their client support Linux long time ago

Currently there is no Linux support. Though it does work under Wine with a few issues and hiccups. You have to add specific things to your Wine configuration to get achievements and such working, the client will sometimes require a alt+tab or click off and then on when you hit something like uninstall, no in-game overlay, and few other little hiccups. However, it does work pretty good and having no in-game overlay is fine at the moment. As the overlay in its current state is nothing more than a chat, frame counter, and screenshot taker. You can pretty much live without it as there are plenty of alternatives for these functions. Also, the screenshot option doesn't have a manager or upload it to your profile like Steam so any screenshot tool in Linux can do the same thing. I'm not trying to defend GOG one-hundred percent here as things have been really slow. Slower than Valve time. However, GOG Galaxy even on Windows is beta and has quiet a few problems. I do not have a Windows machine personally, but some of my buddies with Windows machines have problems here and there with this client. If GOG released this in its current state on Linux, it wouldn't be that great and probably worse off than Windows. Being as I've seen the headaches they've gone through first hand.

A small list of problems I've seen on their Windows PC's & My experiences through Wine that happen on their Windows machines as well.
1) At launch it can eat up to 90% CPU load trying to load every attached accounts information.
2) Every launch it has to load the information again. Depending on your internet speed it can take a few minutes or forever. I've even seen this slow down and lock up slightly when Galaxy is trying to update a game on launch during this load period.
3) Crashing of either a plugin or something else reloads the above mentioned. It can even make the system change focus of applications to overlap your game you're currently in. (I've only seen this happen about five times on a Windows machine, not yet on my machines that are Linux. Though what an annoyance).
4) Even after all the loading sometimes the artwork for cover art, backgrounds, et cetera don't always load. Instead you see "Unknown Game" in its place. You can have some games appear while others are like this too.
5) Achievements can be completely broken. Possibly this is slightly on the developers, but at the same time the way the achievements are implemented could change tomorrow, hints beta.
6) Missing features like crazy. The activity feed for your friends in client can't do some of the things you can do on GOG Activity feed via the website. (Mainly liking, making comments, and other features). Along with a few other basic features you would find in say Steam.

There is quiet a few other random things that happen you would never see in Steam. Given as this is still labeled on the site as Beta technically. Then GOG forced the Beta 2.0 onto those that were using the older client 1.X stable via updating and you needed to have a workaround to go back. Then you lost some functions in 1.2 because of the push to 2.0, so everyone is kind of beta testers or potential beta testers for any other random whims GOG has. In all honesty I'm almost glad not to be on a Linux alpha client tester when it's still not even that great for Windows. Though I am with you, I would love to see the Linux client. When the GOG Galaxy client for Windows can at least become more worth while. Maybe then we can stand a bit of a chance of not having a pure garbage client that never gets updated due to Windows still needing resources.

Edit: For the record to any people that love Galaxy, I'm not saying Galaxy is bad. Only that it's no where near perfect, but most of its functionality works fairly well. Once you get over the slumps, like living without basic features like "offline mode" for the client. Not just turning off the client and playing the game by itself without Galaxy features like say achievements. When something like GOG going down happens as it did today. Profiles all out of wack and everything.