Today an international group of scientists, diplomats, and timekeepers voted to end the leap second, which has been keeping Coordinated Universal Time (UTC) aligned with the time according to Earth’s rotation (UT1) within one second of difference.
A new system, called the “leap hour,” will allow the Earth’s rotation and official time to fall out of alignment by a full hour



GPS doesn’t handle leap seconds. Currently devices have to subtract ~18 seconds to convert from GPS time to UTC, this just means that offset will never need to be updated for a few thousand years. Other GNSS constellations may be different, but I assume they’d also be unaffected.
Very interesting info, thanks!!