The Resistance ride is not GPS, it's WiFi. Just like the Luigi's Roadsters ride in Cars Land uses WiFi, but the Resistance is on a much larger scale. It's been reported by several insiders that the same contractor who designed the WiFi ride system for Luigi's in 2016 was used again by WDI to design the WiFi ride system for Resistance, an outfit called Oceaneering.
They didn't use WiFi in Tokyo for the Pooh ride that was designed in 1999 and opened in 2001 because WiFi wasn't available back then. And in 2019, Japan has very strict rules about using WiFi networks for public consumption. Japan is very advanced, but when it comes to public WiFi and use of smartphones they aren't at the level of widespread use that America and Western Europe is. Japan still uses their version of America's old Bell System monopoly running their phone systems, Nippon Telegraph & Telephone (NTT).