Nope. Otherwise they would have shown it on the main page.

Do you own the game on GOG to verify this? If not, thanks for trying to help, but no that isn't always true. There are quiet a few games on GOG and sometimes Steam that don't get the store page right.

Sky Cannoneer is a good example of this and even the developer replied in the post saying it wasn't showing on the store page.
https://www.gog.com/forum/sky_cannoneer/q_question_about_gog_steam_versions/post4

That is only one example, but there are more even. I will not make this post a link list, but it happens a lot on GOG sadly. Where as Steam it happens, but way less frequent. Nonetheless I take the chance and ask about Steam even if it's less likely.

Thank you for the reply. It's a shame then this game does not have feature parity on both platforms. Because, the cloud saves on GOG verse not having them on Steam makes it stink for owning it on Steam. (Based on the Steam store page not listing it. I will probably ask on the Steam forum to make sure). Then not having the same on GOG for achievements kind of makes it feel the same. You're not getting something for your money either way. =/

Anyway, hopefully that will happen. :)