$ sudo apt-get update
$ sudo apt-get install printer-driver-sag-gdi 

printer-driver-sag-gdi is installed in your system.

Make ensure the printer-driver-sag-gdi package were installed using the commands given below,

$ sudo dpkg-query -l | grep printer-driver-sag-gdi *

You will get with printer-driver-sag-gdi package name, version, architecture and description in a table

printer-driver-sag-gdi package basic information: