This mimetype is deprecated. You should still support it, but avoid using it to assign new mimetypes.
Instead, please use gcode
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
Further reading
No additional links listed