Mobile- Gangstar Vegas .g4 files?

[Pingus!]

I found a file in this mobile ios game named "sounds.g4" and I have NO clue how to open. Any ideas? Here's the file:
http://www.filedropper.com/sounds_2
Just press the "Download File" button.
Any information on how I could possibly decompile the file into the individual sound files, or any other leadway on how to view it would be great, thanks!
~Anex

Recap:
Platform: iPhone(ios)
Game: Gangstar IV- Vegas
File Type: .g4