I have not seen the Cloud Save feature in the game store, although in steam it appears.

Can anybody confirm if there is such feature in GoG? If not, is it planned to add such feature?

Thank you for your time :D

The game is not supporting could saves at the moment and steam offering them is not an indication that it should have because cloud saving on GOG uses a completely different system (Galaxy). However GOG is planning to add cloud saves to as many games as possible so chances are good that this one will be supported in the future as well.

GoG Galaxy support is coming at some point:
http://teamcherry.com.au/blokkan/#more-1202