GPS became available to the public in the 80’s. I’d say that counts as decades old

GPS tech is definitely decades old, I could dig out a couple of handheld units I have in a box that would qualify for that distinction (circa 2000) and those were a few models into what was available to consumers let alone unis and governments.

Using that specific application for decades is more of a stretch, but technically possible if you count all Mapfactor navigation and they first used it on a PC (released 2002 apparently). Even on mobile devices it’s not that far off qualifying as possible though (released 2007 on Windows CE so 16 years).