How do you store the coordinates them on caches? Do you only use the GC Corrected Coordinates function on gc.com? do you also put them in the cache notes?
Because of how the gc.com api works there is no way to easy get all GC Corrected Coordinates (except then download all caches for all uses) from caches but there are a way to get all cache note(you can download all in one reqiuest).
If you put them in cache notes they will be updated every day.
PGC can detect coordinates from the GC Corrected Coordinates when you build a gpx check the "Refresh corrected coordinates" box and they will be update from both the cache note and the GC Corrected Coordinates. The later is only for caches that will be in the gpx of cource