[Kurona]

GPS being a thing with all or most Gold Plastic is a misconception! It effects a very specific type of plastic that was mostly just seen in the late 80s to mid-90s, with a small handful of exceptions running past that in the 00s. 'Gold Plastic Syndrome' is itself a bit of a misnomer, as the common running thread is instead in swirly/metallic/sparkly plastic which has for instance been seen in grey plastic -- it's just that it's most common in gold.

Simply put I would be very very surprised if RKF Grease was down to GPS, and it's certainly not a worry for any other Toku toy that uses gold.