On UNIX systems, GPHIGS uses the X11 library R3, R4 or R5: -lX11
On OpenVMS, GPHIGS uses: DECW$XLIBSHR
GPHIGS runs on all X Window terminals and all workstations connected to an X11 server.
The standard configuration for fundamental GPHIGS 3D capabilities is as follows:
-256 colors (pseudo-color)
-6 Mb RAM