Sorry if mentioned somewhere before when will GOG start to release newer titles? Is there a date for it or just "when it's ready"?

No specific dates, just sometime this year. And don't expect the games to actually be "new" as in new releases; the "new" games GOG will be getting are still old releases, they just expanded the window of what is considered old to include games that have been out for less than 3 years.

next two releases will be 7th Guest and 11th Hour... I won't call them new :)