I learned about gog again. I bought Witcher 3 have it installed, but it doesn't launch. I can hit the play button, but nothing happens after that. Is this a bug on Witcher 3 or Gog? Any suggestions? Thank you for your time.

Can you tell us your PC Specs? If you have a laptop it might try to launch the game from your intel graphics. Also you can contact gog support because they have people that know how to fix these problems. also check if your graphic drivers are up to date.