I tried to install Cyberpunk 2077 patch 1.1 yesterday and it didn't work via GOG Galaxy 2 -- luckily I managed to cancel the broken download and it did not corrupt my game 1.06. Anyway, so I downloaded the patch manually from the website. After I installed the patch 1.1 I decided to download the offline installers in case these kind of update install issues happen again and I might have to reinstall the whole game.

But right after I updated 1.1 and tried to download the rest of the files, even downloads did not work any more from the GOG website. And they still don't. I tried again just now.

Chrome just gives me this:
This site can’t be reached
cdn-hw.gog.com took too long to respond.

Try:
- Checking the connection
- Checking the proxy and the firewall
- Running Windows Network Diagnostics

ERR_CONNECTION_TIMED_OUT

I tried with files for Cyberpunk 2077 and then as a test for Irony Curtain.
I cleared my Chrome's cache and hard reloaded the page.
I reset my Firefox to factory settings and tried with Firefox.
I have no problems downloading from other platforms.
I have no problems downloading things with a browser from other websites.

It starts to look like it might be GOG's servers.

Are you still having issues? I have just managed to download the installer for Hexen, so if you still have issues, it could be regional or an issue at your ISP.

I recon it's my ISP. I just used a VPN and it worked. I guess I need to call my ISP and ask what they are doing there. Thanks for the tip.