Was doing my in depth research of version parity and so on before buying DUSK here on GOG and apparently the only way to download DUSK's SDK is through Galaxy on GOG:

https://www.gog.com/forum/dusk/dusk_sdk_and_gog_galaxy

Is this correct?

How those of us that use Linux to download our games will be able to download, use and mod the game if there is no way we can download the SDK without Galaxy?

After getting Dread Templar here and enjoying it a lot, I wanted to support and play Dusk here on GOG too.

There are no other way for us GOGers to get the SDK?
If not, I won't be buying it.

Thanks