is it worth it to go from just the factory stereo to a stock navigation system, i really like the look of factory stuff in the gs, and is it possible to do that upgrade, thanks

 

if you got the money, everything is possible.
if the dealer sells you just the GPS display dash unit
all you need is to modify it to receive TV input signal, get an aftermarket unit (install in trunk or something) feed the signal to your display==>> you get the GPS system that look factory
hmmm there an idea for me...


or you can get the the stock gps system, but some ppl told me that the gps wiring is not there, so you'll need to take your car a part to wire in the gps==> costly