An upcoming Griffin gaming accessory for iOS devices has been outed by a recently published FCC filing. The PartyDock is a set-top gaming accessory for the iPad and iPhone 4 that allows users to dock their device and use four wireless remotes to control specially-written games, including “Midway Motors,” “Fishing Frenzy,” “Flippin’ Frogs,” and “Wits and Wagers Family,” with the potential for more…