GM Converter

Convert G-code and mod files (GM) online for free


Drop or upload your .GM file
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How to convert your GM file

  1. Click the "Select File" button above, and choose your GM file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert GM to another file type

The converter easily converts your GM files to various formats - free and online. No SheetCAM or or other Cad software needed.

  • GM to DDS
  • GM to SYS
  • GM to RAD
  • GM to JPG
  • GM to BLK
  • GM to DPX
  • GM to PCC
  • GM to YUV
  • GM to MBM
  • GM to BW
  • GM to XBM
  • GM to FTS

Convert a file to GM

To convert other file formats to the "CAM G-Code Instructions" file type, you need software like SheetCAM or a similar tool.


About GM files

The .GM file extension is highly fragmented. Most commonly, it functions as a CNC machine G-code file generated by CAM software such as SheetCAM. These files contain alphanumeric coordinates that instruct CNC routers, plasma cutters, and mills on how to move. Alternatively, .GM files act as addon archives for the popular sandbox physics game Garry's Mod, or as proprietary 3D game models used in the legacy Akella STORM Engine (often exported via Autodesk Maya). They also occasionally appear as General MIDI sound banks for retro hardware.

Because the extension spans multiple radically different formats, managing .GM files is frustrating. If it is a G-code file, the primary disadvantage is machine-specificity; a .GM file configured with a post-processor for one machine might crash a different CNC controller. If it is a Garry's Mod addon, the format is entirely useless outside the game engine and requires specialized extraction to view the contents. The 3D model variants are proprietary binary files that modern 3D software simply cannot natively read without legacy plugins.

Conversion targets depend entirely on the file's internal structure. For CNC manufacturing, convert .GM to standard NC, GCODE, or plain TXT for cross-compatibility and safe editing. For game addons, you usually need to extract the contents to ZIP or modern GMA formats. Drag and drop your file to analyze and convert it - free, online, and without installing software. convert.guru will automatically detect the file's true internal signature and offer the correct conversion options.

Use Convert.Guru to open and convert your GM file.

Users also converted GM1, GBR, GMA, ZIP, GCODE, TAP, ATP, GPX, MG and LB files.


FAQ

If you want to convert GM file to MG, LB, EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP or MAP, you can use SheetCAM or similar software from the "CNC Machine Instruction Code" category. In the File menu, look for Save As… or Export….

To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to GM, try SheetCAM or another comparable tool in the "CNC Machine Instruction Code" category.



The GM Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our GM converter.