Garmin G500 Cockpit Reference Manual page 24

PRIMARY FLIGHT DISPLAY (PFD)
Switching Between Navigation Sources
NAVIGATOR 1
NAVIGATOR 2
The Course Deviation Indicator (CDI) can display two sources of navigation:
GPS or NAV (VOR or LOC). Press the CDI soft key to toggle between the available
CDI modes, (GPS or VOR).
If a second GPS source or NAV source is available, pressing the 1 - 2 soft key
will toggle the navigation sources (VOR1 and VOR2, or GPS1 and GPS2).
NOTE: Verify the navigation source by the indication on the HSI.
NOTE: The selected navigator is the active navigator for all the PFD
and MFD operations, except for the supplemental bearing pointers.
14
GPS
GPS
CDI Sources
G500 Cockpit Reference Guide
VLOC
NAVIGATOR 1
VLOC
NAVIGATOR 2
190-01102-03 Rev C