I've seen very aggressive seagulls, but this is totally expected. The Inspire1, in its striking Black and White colors and tapered fuselage design looks a LOT LIKE A BALD EAGLE, the hated enemy of all Seagulls!
Bald Eagles (here in the Pacific NW they've made a great comeback and are all along the coastal forest ranges from S Oregon to Vancouver Island and around Seattle in the Sound), especially in the Spring, just love to fly along over seagull nesting areas and pick off their young chicks for breakfast. Upon seeing an Inspire 1 gulls up here will immediately become agitated. I landed my Inspire back in March near Waldport OR, on an early morning flight, when the back bay's 200+ resident gulls began to cry out, and flew into the air circling a stationery I1 at about 150 feet of altitude. After landing those crazy gulls did not quiet down for a good 10 minutes!