There isn't much here other than the AFM procedure. I'll give this more thought when I get a chance.
Everything here is from the references shown below, with a few comments in an alternate color.
L Main AC-Volts
With RAT Generator on the following systems are impacted:
THE EMERGENCY AC BUS IS NOT POWERED IN THIS CONFIGURATION. THE EBHA AND UPS BATTERIES ARE BEING DISCHARGED.
Airspeed should not be reduced to less than 200 KCAS until it is necessary to land so as to ensure proper RAT operation.
The RAT will power the Emergency AC, L ESS DC and R ESS DC busses.
RAT GEN will drop off line below approximately 200 KCAS. To prevent the RAT GEN from repeatedly shedding the load and then resupplying electrical power, the RAT GEN must be selected OFF prior to decelerating to less than 200 KCAS.
(1) RAT GEN . . . ON
Gulfstream GVII-G500 Airplane Flight Manual, Revision 4, August 29, 2019
Gulfstream GVII-G500 Production Aircraft Systems, Revision 3, July 15, 2019
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