BKGaming: There seems to be some kind of problem with the update service right now... it may just be down. GOG hasn't updated the download page yet but I believe you can find the latest version here:
https://cdn.gog.com/open/galaxy/client/setup_galaxy_1.2.29.28.exe Just in case anyone needs it.
I looked at some logs and saw some interesting entries:
2017-11-20 15:39:04.798 [Information][ (0)]: Downloaded JSON
https://cfg.gog.com/desktop-galaxy-updater/4/master/files-windows.json 2017-11-20 15:39:04.798 [Error][ (0)]: Error encountered while parsing files JSON; last successfully parsed entry: "". Exception: Syntax error (JSON syntax error), code(0)
2017-11-20 15:39:04.798 [Error][ (0)]: JSON string for which parsing failed: "‹"
If you go download that JSON file manually it looks just fine. I think that 1.2.29.28 has some issue with understanding server data I'm also getting dropped immediately after connecting). I'm going to try rolling back to an older version.
Update: Rolling back to 1.2.16.67 did not fix the issue. Would debug in Fiddler if I knew how to force GOG Galaxy to use a proxy.