The game includes high-quality MP3 and FLAC files in the installation directory.
If you're looking for the official in MP3 format, you likely already have access to it. CD Projekt Red provides the official score and some radio tracks as a "useful feature" for owners of the game. How to Access Official MP3 Files Download cyber punk 21548 mp3
Offers the Radio Vol. 1 Soundtrack for digital download. The game includes high-quality MP3 and FLAC files
Right-click the game in your library > Manage > Browse local files > BonusContent . select the game
Open GOG Galaxy, select the game, go to the Extras tab, and download the soundtrack directly.