is it out for gog version?

Seems not. But seeing how the Steam update only says it left beta on the 20th of June, there might be hope, though I wouldn't hold my breath. I've just about come to terms with the fact that if I want a game and part of my desire for it is a level editor I should steer clear of the Gog version.

Escape Goat 2 still hasn't gotten the editor as far as I know, and it took eternity for Legend of Grimrocks editor to get addded.

My bet is on never, we got just scammed by buying an incomplete game at full price.

You lose.

Shame on me then!
Then it's only a matter of when, but considering the developers I suppose it will take at least a month.

An optimist! Still you would think the devs would have the foresight to not have the base version of the editor be the Steam version given they knew they were going to be making a non-Steam editor.

Fixed.