Be careful. The G5 install manual has been updated many times since the Rev. 9 quoted above. Always consult the latest manual for the most up-to-date information. Here is what the latest revision (24) says about the internal GPS and glare shield antenna:
3.4.1 GPS Antenna
A GPS signal is required. The G5 can use the Glare Shield Mounted GPS Antenna or GPS data from one
of the GPS navigators listed in Section 5 or a GPS-enabled GTX 3x5 transponder. The G5 unit is capable
of utilizing both a GPS Navigator/GTX 3x5 and a Glare Shield Mounted GPS Antenna for GPS position
simultaneously.
In a dual G5 installation only, the G5 Attitude requires the GPS position input. The GPS information is
communicated to the G5 DG/HSI over the CAN bus.
If a GPS Navigator or a GTX 3x5 is used for a GPS signal without a Glare Shield Mounted GPS Antenna,
disable the internal GPS receiver of the G5. If the G5 is connected to the Glare Shield Mounted GPS
Antenna, enable the internal GPS receiver. See Section 5 for configuration settings.
This STC approves the installation and interface of the BNC Glare Shield Mounted GPS Antenna,
P/N 011-04036-10. The 011-04036-00 TNC Glare Shield Mounted GPS Antenna is approved as
well, but requires a TNC/BNC adapter to connect this antenna to the G5, adapter P/N 330-01754-00.
