gemtopnm
Convert a GEM image file into a PNM image.
TLDR
Convert a GEM image file to a PNM image
$ gemtopbm [path/to/file.img] > [path/to/output.pbm]
Describe the contents of the specified GEM image
$ gemtopbm -d [path/to/file.img]
Display version
$ gemtopbm -version