From the author's README on Thunderstore

The 6 songs that are known from gta 6

Playlists & Tracklist

Gta 6

Keith Richards, Grand Theft Auto VI - Bright Lights, Big City (from GTAVI: The Album)
Morgan Wallen, Grand Theft Auto VI - Last Thing You Need (from GTAVI: The Album)
Rauw Alejandro, Grand Theft Auto VI - Macacoa 2000 (from GTAVI: The Album)
Travis Scott, Grand Theft Auto VI - RHYNO (from GTAVI: The Album)
CA7RIEL & Paco Amoroso, PinkPantheress, Fred again.., Etienne de Crécy , Grand Theft Auto VI - Sexy Magic (from GTAVI: The Album)
Yung Lean, Grand Theft Auto VI, Metro Boomin, Future - That's It (feat. Future & Metro Boomin) [from GTAVI: The Album]

Installation

Install via Thunderstore Mod Manager, or drop into your ReSkate launcher.

Packaged with ReSkate Music Packer

Install Gta6radio

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Gta6radio and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.