Not really "this gang = this kind of music", but something close (and still not really lol)What makes it even worse is from what I understand, Cyberpunk 2077 have gangs based around bands or certain kinds of music. While ingenious to parody the music those gangs listen, it'll create a challenge.
Cyberpunk universe is grounded in reality, it's basicaly "take today with good and bads and imagine the Today in 50years"
Today, musical culture, and mostly in youth is pretty wide, and with internet it's wider than it never was (i'm sure we know a lot more bands than our parents)
So we can assume that in 2077, the "mainstream-media-music" will still be there, but the underground scene will be as wide as now (maybe even more, and even more in a cyberpunk setting).