GPS Systems are so common these days that you only need your smartphone to hook up in your Car and you got yourself a helper. Not unless you want an "Exclusive" and "Rare" beauty like this Evangelion's NERV Navigation System which is made specifically for the fans of the anime.
The Evangelion GPS Navigation system is available for purchase on this Evangelion store. All in all the total amount of the device is 39800 yen which is close to 500 USD.
This is so cool, I want one!
source 1 & 2