Who does not know it from the good old days. I have used it for many years.
Graphic Packet Dos
gp161b > gp161b.zip
gp163update > gp163upd.zip
Graphic Packet Windows
gp85v090 > gp85v090.zip
gp85v091_update > gp85v091_update.zip
Take a look in de Download section of this website for more old Software and Drivers.
Look at this website for all the tools and programs for GP.
http://dnx274.org/markus/gp/