If it´s "just a normal monitor" you can connect to a playstation or dvd player it can´t handle any gps signals - if it´s some sort of computer w/ a usb port it can PERHAPS use your signals. You need some sort of software to connect the PC to the GPS and you need digital maps on the PC to show your position.
In my rig, I have to run a laptop computer and a "Liliput" moniter. My Magellan hooks to the computer and displays on the Lilliput. I run Oziexplorer software for mapping. Not sure if this helps in your question, but I don't think you are going to be able to hook directly to your display unit.