You may be better off selling for parts, That was a General Numerics version of Fanuc, IIRC it did not have built in PLC so you can use a 3rd party make of your choice, the one I am thinking of has a LED numeric display instead of crt,
you would need all the manuals and some experience in off-the-shelf-system retrofitting to make it viable. They had a mill version and lathe version.
If you posted a pic. I could tell for sure