Make No Man's sky availed on "GeForce NOW", please.
Wat more can I say?
According to the forums it is up to the publisher to do is, so please mace it available on Ge Force Now.
I don't understand why is it not available, on from GOG already, it has been available from steam for a long time now.
(Is this some messed up tactic to make me buy the game a 2th time on steam?)

Well, GoG is not the publisher of NMS, it's just a distributor. Publisher (and Developer) of NMS is Hello Games. Or with other words, they publish their own game. Afaik, neither of them read these forums, so putting such a request here is for vain.

GoG is slowly adding support for GeForce Now according to :
https://www.nvidia.com/en-us/geforce/forums/gfn-general-chat/20/296297/gog-galaxy-support-on-geforce-now/
https://twitter.com/GOGGalaxy/status/1329430292747202568

You could either follow/contribute to those discussions and request NMS support there or directly contact GoG support and Hello Games support (I doubt the latter have ever read anything written to them).

With that being said, no, I doubt they do it because they want you to buy it twice, even though they would probably appreciate it. As the games currently supported are all GoG (CDProject RED) own products, I would guess that there are legal issues somewhere, maybe with the installation process and accepting the Eula for the end-user which they cannot simply adjust like their own licences? Who knows...

for drivers
GeForce NOW, please download at:my-hpdriver.com
may be useful

thank you very much