Hey Whaley,
i honestly think you'll be okay.. the G2's arent a super luggy tire (correct me if im wrong).. i currently have the 2.5" level, 20x10-24 with 33x12.5's.. they are the comforser MT's so they are quite luggy and i only rub a small bit of plastic (inner cab corner) in reverse..
seeing as how the 285/55R22 equals about a 34x11.2 I really think you'll be okay.. the stock tires that came on my stock 22's were 285/45R22, you're really only going up in height and staying the stock width!