The GCD is a little before my time and therefore I am unfamiliar with the datafile format but I have successfully translated most MSDChemstation .D datafiles to a MassHunter .D formats by using the MassHunter translator. This will enable you to do data analysis using MassHunter on Windows 10 if you have it configured correctly.
I have updated the tags for visibility. The .d data format can be read with a chemstation or converted as nickbharden mentions. You will not have much luck with printers for Win 2k. There is a generic laser print driver that will work with some models newer than the laser 4, but this would be a guessing game as to which ones.