Hi,
I have problem with transfer on gog.com and also gog galaxy.
No matter what i have download (Witcher 3 or Fallout) or os (Win 7 or Win 8.1) transfer is about 20-40KB/s... Its dramatic...
With other sites transfer is 6Mb/s... Only on gog.com and gog galaxy transfer is poor.
I turned off firewall and try firefox or opera and still transfer is poor.
I want to download Witcher 3 but with transfer 30KB/s it is impracticable.
Please help me. Maybe someone knows a solution to this problem.

Are you always having that problem or just now?

Because at the moment everything is slow because of the huge Witcher 3 patch that everyone is downloading.

try this instead https://www.gog.com/downloader or download directly with your browser
after you will be good to go!

@moonshineshadow
I have this problem lately. Today, and week ago and two weeks ago.
I rarely downloading games but two or three months ago transfer was ok.

@AlexZeusMerce
Now i tested gog downloader and gog downloader give me transfer 150-250KB/s is better but still poor.
On other sites and ftp i have 6mb/s

I also download directly with my browser. I wrote in the first post - firefox and opera and transfer was 20-40KB/s.