To use a G5 as DG/HSI, is a magnetometer required, and if so, is it included?
yes, there are two G5/HSI Kits and both include the GMU-11 Magnetometer. The K10-00280-21 G5/HSI will provide HSI course guidance for only GNC-255A or SL-30 Nav/Coms. The K10-00280-31 also includes a GAD-29 Avionics Adapter so it will interface and provide course guidance for GNS-430W/530W, GTN-650/750, GNX-375, GPS-175, and GNC-355.
Do these G5’s in this package include LPM?
Yes, that is the Install Kit available now for the certified G5's...the LPM is included.