This is a work in progress.
Photo: Visual approach, iFlightDECK, Standard Maneuvers, p. 23
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The recommended FlightSafety procedure is to call "Flaps 10" no later than 7 miles, "Flaps 20" and "Gear Down" no later than 4 miles, then on base leg or no later than 3 miles "Flaps 39" and "Landing Check." They then want you to fly VREF+5 unless the winds are "strong" and then to add half the steady wind plus the entire gust up to a maximum of a 20 knot additive. Okay so far. But then they say to reduce power at 100 feet so as to cross 50 feet at VREF. Nobody seems to do this. As long as you fly the airplane onto the runway, landing in the touchdown zone with the autothrottles engaged doesn't seem to be a problem.
Using FLCH mode in the traffic pattern is discouraged. Early G500 would generate a cyan FLCH Inhibit Altitude CAS message if FLCH is selected below 2,000 feet AGL or AAL. I have not seen this. I think FLCH during the takeoff phase is fine and perhaps the AFM section on this is written in error. Using FLCH during a visual approach, however, is a poor technique. Why? See: Asiana Airlines 214.
Gulfstream GVII-G500 Airplane Flight Manual, Revision 1, August 31, 2018
Gulfstream GVII-G500 Production Aircraft Systems, Revision 1, Oct 1, 2018