A Fractional Company First Officer reported GPS interference on short final to PBI.

Narrative

Flight Phase: Approach. Location: On 10-mile final for ILS 10L into PBI. Weather Conditions: VMC. Flight Crew: Two pilots - PIC (Pilot Monitoring); SIC (Flying Pilot). ATC: In contact with PBI Approach/Tower. While on a 10-mile final for the Visual and backing up with the ILS 10L into PBI; established at approximately 3;000 feet MSL (level flight) and turning south to intercept the localizer; the aircraft experienced an unexpected aural '10' foot callout from the radar altimeter. Immediately following this; we received a 'TERRAIN TERRAIN - PULL UP PULL UP - SINK RATE SINK RATE' aural warning accompanied by a CAS message. At the time of the alert; we were operating in VMC and had visual contact with the airport environment and was at a level and stable flight status. I was the pilot flying and immediately disconnected the autopilot to maintain level flight and continue tracking inbound on the localizer. The captain (pilot monitoring) maintained a visual scan for traffic and terrain. Also he alerted the Tower of GPS jamming / Interference. Given our VMC conditions; confirmed altitude; and situational awareness; we assessed the alerts as false; likely due to GPS interference or jamming affecting altitude or terrain systems. We elected to continue the approach under visual guidance; switched to manual visual callouts; and completed a stabilized and uneventful landing. As we kept getting closer to the Runway the Radar Altimeter kept shouting '10' at us and was showing in our PFD's we were on the ground. Our [screen] was showing brown. Again we noted we kept getting erroneous false errors. We were visual and VMC.