How to enable GPS in 'GPS Ready' DVD LCD?

DVD LCD in car is said to be 'GPS ready'. It has a GPS option in the menu. What hardware or software do I need to make to work? I've been googling for what 'GPS ready' really means but still clueless on what I really need to make it work.

I don't know the brand because it comes from an 'all-in' car package and I can't find it in the manual either.

Appreciate the help guys!

Thank you!

you need a receiver antenna for it to become GPS capable. inquire with your nearest dealer.


WBR,