That engine will pull it great. I don't know any of the wing loading ststistics on it, but regardless, the GPSB is not a floater!
Practice a few slow flyby's with some altitude to get a feel for it's stall speed. Check out this video of a landing:
http://204.96.183.34/Skybolt/Videos/Landing.mov
Mine flys hotter than most due to the extra weight of the smoke system and the 4-stroke, and this was a faster than usual landing anyway. You will be able to land slower, but don't expect it to float in.