http://albumjams.com/album/grand-theft-auto-5-soundtrack-download/#.
You may need to install IDM(internet download manager) to download these songs.
You can download it by clicking here.
You can also download these tracks from itunes from the link given below:
https://itunes.apple.com/us/album/the-music-of-grand-theft-auto-v/id712610834.
Also, if you want to download OST[original sound track] of more GAMES visit the following link:
http://downloads.khinsider.com/.
