: Likely stands for "General MIDI" or a specific "Grand Master" pack.
Since this appears to be a production asset, follow these steps to locate the source: Download banshee138bpmgm 21487 mp3
Searching for "banshee138bpmgm 21487" does not return a direct match for a specific, widely known MP3 file. However, the naming convention suggests this is a or a sample used in Digital Audio Workstations (DAW) like FL Studio or Ableton. The filename likely breaks down as: : Likely stands for "General MIDI" or a