Shouldn't affect GPS/IRU navigation, except for updating databases to "conform" to magnetic navigation where needed. Shouldn't affect GPS satellite orbits - those are based on gravity (and maybe solar wind), not magnetism.
The magnetic poles and declination lines are
always squirming around - in this case just faster than predicted:
https://en.wikipedia.org/wiki/Magnet...90_to_1990.gif
And - yes - VORs can be, and are, updated as needed.