Jets N Guns Gold. I had wishlisted this game on Steam some time ago because it looked like a blast and got good reviews. I noticed it had been on the community wishlist for years now. If it's been this long already, I have little hopes ever seeing a GOG version.

Damn. I can't edit that typo in my title.

May want to post in the "Promote a game wishlist request" thread located here:

https://www.gog.com/forum/general/suggest_games_esp_indie_with_less_than_300_wishlist_votes_that_people_should_vote_for

Good luck