There was a DJ called Fuckstorm that used to do some live PAs with this. I used to have some mp3s of his. I can't find any examples of his music online anymore, unfortunately.
"Live PA" is a term commonly used in the electronic music universe to describe a performance by an artist that typically involves all hardware (synthesizers, Gameboys in this instance, etc.) instead of all software or just someone DJ'ing music.
performing artist
I guess yes, i.e. live performances where gameboy audio output was connected to a PA system[1] (likely together with other instruments like drum machines or samplers).