Rockstar Games / Take-Two lawyers haven't come for the composer yet.
Previously, Rockstar Games published a series of screenshots and promo art for Grand Theft Auto 6.
A user with the nickname custom._._ took a closer look at one of the frames and noticed a monitor with the interface of a music production program. He tried to recreate the track and published the resulting recording online.
A recording of a fragment of music from GTA 6 is available at the following link (and here)