From their FAQ:
"We have already spoken to GOG but don't have any definite news yet, however given that StarCrawlers is available on their store, we are confident Chimera will be released there as well. We will announce when and if there is news regarding new platforms."
This does not give me enough confidence that if I back their KS I will get a GOG key for it. I have no use at all for a Steam key.
Additionally, their most recent development on Starcrawlers - that cyber combat stuff - was so un-fun to do that I worry about subsequent things they will produce, like this project.. I think I might wait to try a bootleg copy before deciding to buy it at GOG or support their KS. I can't afford to buy games that put me to sleep.