Did a video game make this song famous to you? Me too, but it's from a TV series if it's spelled "Gunn" and it's a song by Henry Mancini if it's spelled "Gun." Look at my search results:

Spyhunter was a much loved arcade machine released by Bally Midway but I confess straight away to never playing the actual Spyhunter, only the port to the C64 upon its release. The game was a top down

This is Spy Hunter straight from the arcade played in Midway Arcade Origins (PS3). ▶️ DTube ▶️ IPFS

Source: The original Spy Hunter was one of my favorite games on the Commodore 64 so I was pretty excited when this remake came out. The original Spy Hunter was released as an arcade game by Bally/Midway