If you still have the original packaging, a mini CD is included. Insert it and run Setup.exe . This is often the safest method.
Most GP 58 printers have an RJ11 port on the back. To make your cash drawer pop open automatically: Go to Printing Preferences. Look for the "Paper/Quality" or "Device Settings" tab. Find the "Cash Drawer" option. Set it to "Open Before Printing" or "Open After Printing." Gp 58 Printer Driver