Installing one of the newer GPD drivers, mapping to the printer IP, this printer works fine.
However when mapping to a print server that has over 40 other printers, this printer is problematic. It only prints in Black and White, from multiple applications. When you click printing preferences on the printer (on server 2012), it displays a pop-up box "The driver has detetected that you have selected Black in White in the application. For best image quality......" But black and white is not currently selected.
Currently using driver GPD PCL6 V5.733.11.0
It did work for years with driver GPD PCL6 V3.4.377.6.0 . However with recent windows updates it caused its own set of issues.