gOS probably uses the CUPS printing system. I don't know what tools gOS provides, so I'll tell you the generic setup.
Login as root user, and disconnect from the internet while logged in as root.
Start up a browser. In the URL bar (the web address bar) enter http://localhost:631
That get's you into printer administration the CUPS way. From this point, you can add a printer. That consists of giving a printer name, the print quality you want, page orientation (portrait or landscape), etc.
Which means, you can create several printers (different names and settings) for different kinds of print tasks. It saves a lot of time spent in page or printer setup before trying to print.