The usual features: Browsing the store, Buying games, Installing, Uninstalling, Achievements...
What does not
As previous submitter Ben Anderson said:
BEFORE installation, symlink $WINEPREFIX/drive_c/ProgramData to $WINEPREFIX/drive_c/users/Public. If you tried to install without the symlink, you will need to uninstall with `wine uninstaller` and start again from the top.
I also had to increase the upper limit of files that can be opened at the same time to prevent the client from freezing after some time. For systemd: Set "DefaultLimitNOFILE" in /etc/systemd/system.conf. 8192 works fine for me.
What was not tested
Galaxy self update
I installed 'corefonts' and 'vcrun2017' via winetricks in a fresh 32bit wineprefix, switched windows version to Windows 7 via winecfg, and applied the workarounds from above.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Show||Solus||Jun 14 2019||4.6-staging||Yes||Yes||No||Silver||Markus H|
|Show||Manjaro Linux 18.0.0||Apr 22 2019||4.5||Yes||Yes||Yes||Silver||Filip Sutkowy|
|Show||Arch Linux x86_64||Feb 07 2019||4.1||Yes||Yes||No||Platinum||Ozan|
|Show||Arch Linux x86_64||Dec 08 2018||3.21-staging||Yes||Yes||Yes||Gold||chris|
|Show||Ubuntu 18.10 "Cosmic" amd64 (+variants like Kubuntu)||Oct 23 2018||3.18-staging||Yes||Yes||Yes||Gold||Igor Zinovyev|
|Bug #||Description||Status||Resolution||Other apps affected|
|15255||ntdll: The memory overview Page in Google Chrome is incomplete (MemoryWorkingSetList for NtQueryVirtualMemory)||NEW||View|
|32342||Multiple applications and games using 'Webkit' or 'Blink' web browser engine crash on startup ('Arial' and 'Times New Roman' font face name validation)||STAGED||View|
|36984||Multiple games and applications need 'mfc110.dll' ('winetricks -q vcrun2012' is a workaround)||NEW||View|
|37110||Steam requires Arial/Times New Roman fonts to open Store/Profile/Community pages||NEW||View|
|44074||GOG Galaxy Client is empty||UNCONFIRMED||View|
|46967||GOG Galaxy doesn't run in virtual desktop||STAGED||View|
As of August 2017
GOG Galaxy 18.104.22.168
Confirmed working on Wine Staging 2.13
GOG Galaxy installs all dependencies by itself
[Optional] Install vcrun2015 to fix self-update error
winetricks -q vcrun2015
Open Wine configuration (winecfg)
At the bottom, set Windows Version to Windows 7
GOG Galaxy Overlay and other in-game features