It would have to be a serial, ethernet or USB printer. You can also set up a print server that your screens can print too.
You could use GP-viewer to see and control the screen from your PC and then screen dump print.
On th GP Designate the display unit's internal device LS14 Bit 2 (print start bit) in [Bit Address] and hard copy should print. Program a button to toggle this bit on the screen you want to print.
Or send the screen to memory card in csv format then print from there.
Your Proface rep should be able to help. It is easy and the help files will lead the way. The print drivers are limited HP, epson, text ASCII.