GCODE files are created by slicing programs, such as Simplify3D and Slic3r, that translate CAD drawings into G-Code, which a 3D printer can read.
There's no official mimetype assigned as far as the author is aware, however these are the ones commonly reported.
File types
.gcode
Also appears as
text/x-gcodeDeprecatedtext/x.gcodeDeprecated
Further reading
No additional links listed
Related to
No related mimetypes listed