What gain is set in version 5,6,7 flightfeeders before they are dispatched to their locations?

It’s just a curiosity,is -10 or AGC is set as the gain for the version 5,6,7 flightfeeders or anything else??

Those hardware versions do not use a rtlsdr, there is no gain setting involved.
(Versions 5/6 are no longer produced)

It may be a beast board where gain is pre set.