.GM File Extension

File Type 1

GameMonkey Script

Developer GameMonkey Script
3.5  |  11 Votes
Category Developer Files
Format Text

What is a GM file?

Script written for GameMonkey Script, a scripting language used for embedding logic into games and other applications; uses syntax similar to the C language and uses concepts similar to the Lua language; can be used for custom software modifications.

More Information

GameMonkey Script files can be run with the GameMonkey Script engine and edited with any text editor.

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Programs that open or reference GM files

Included with OS
Updated September 29, 2011
File Type 2

Transport Tycoon Music File

Developer Microprose Software
1.5  |  2 Votes
Category Audio Files
Format Binary

What is a GM file?

Music file used by Transport Tycoon (TT), a DOS-based railroad business simulation game; stores audio information using MIDI data and can be renamed with the .MID extension to play as MIDI audio; used for looping music while playing the game.

More Information

MIDI files are also used by OpenTTD, the open source follow-on version of Transport Tycoon, but OpenTTD uses the ".mid" extension for game music instead of the ".gm" extension.

NOTE: GM files are also used by the Win32 version of Transport Tycoon Deluxe (TTD), the successor to Transport Tycoon.

Programs that open GM files

Updated March 29, 2018

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