Steam page lists this as an August 9, 2021 release and offers a demo.
What are the odds of us getting access to it?

The Steam version was released yesterday.

There is still no information when a release will be here on GOG?

https://steamcommunity.com/app/1386780/discussions/0/3044982312808859023/

SomaSim [developer] 5 Aug @ 6:26pm
"It will not be available at release on GoG - perhaps later, but not on day one."

The question was raised on steam and the response of the developer does not inspire confidence.

hmm ok, thanks for the info.

That's a pity.

Unfortunately, that really doesn't sound trustworthy.

So is this another game thats getting Steam support and GOG the shaft? If there's no details for a GOG release im just gonna buy it on Steam.

My guess is that since it has to be DRM free to release on GOG, they are probably waiting until the initial sales are done. Perhaps afraid that selling it DRM free on GOG will make it so that people just share the game instead of buying it.

Just a guess ofc, but would not surprise me.