best way to earn GV perks is to capture a field for the lowest numbered team, i'm talking 10-20 perks for a base cap or more.
Think High ENY rides, low number team. I think the best GV run I dream't up was a jeep + supplies to an enemy airfield (all ack down of course) and popped some LA7's spawning in on the runway, base got taken landed 5 kills in a jeep = 60 perks 
OR... resupply a base that is severely damaged. A base that has major damage can award 6+ perks each trip. Each OBJ repaired gets .25 points, mind you that a "repair" point does not mean that it has to have been fully repaired either, you get the .25 GV perk points regardless. So... if a base gets swarmed and 4 ord bunkers, 4 fuel depots, 3 barracks, the radar, and 6 auto ack all get blowd' up, a single run in with an C47, M3, SdKfz 251, or LVT2 with field supplies will award 4.5 perks (if the ENY modifier is 1.0).
Easy peasy.
