G0rbovsky: I've sreached FAQ but I didn't find answer for my question.
Not the proper place for this question, but no worries.
G0rbovsky: How GOG team decide which games from community wishlist will be released ?
They don't. The wishlist can be used as an added incentive for publishers to release their games here, since the GOG team can show them a number for how many people want the game here. But the number is just an extra incentive, which cannot solve licensing issues.
It may help convince GOG to take a second look at a game they've rejected though, if the demand for said game is high enough.
G0rbovsky: Is there somewhere list of games which are going to be released in next months ?
No. Some people may have advance knowledge of what is going to come here, but they are under NDA and cannot talk about it. Not to mention that the games may finally not come here at all.