GPS is not affected, but some other navigation systems like GLONASS might be. Here's what article says:

>The Russian system
incorporates leap seconds, while the Global Position System (GPS) and
others already effectively ignore them. The decision means that Russia
might need to install new satellites and ground stations, says Felicitas
Arias, former director of the Time Department at the International
Bureau of Weights and Measures (BIPM) in Sèvres, France.