ABS and Traction Control are done through wheel speed sensors just like every other manufacturer. Reverse camera's are activated with reverse switch, though each manufacturer will call it something different. Finally not sure how a TPMS sensor could affect your GPS.

They're a dealership. The only thing they know is how to sell, regardless if they know anything about the product. Actually just today at the Mitsu Dealer they told me in Japan all cars sold are LHD and only country that use RHD vehicles is Australia...