XLSDUMP

One may also deliver all data in a  spreasdheet into a GDX file using XLSDUMP.

it is run with the syntax

 XLSDump infile outfile

where:

 infile        is the name of an Excel workbook

 outfile        is optional and gives the name of the output gdx file.

If no output file name is specified, the name of the input file will be the root of the input file name plus gdx.

Unlike GDXXRW, the program does not require that Excel is installed.

This works only on windows platforms.