After thinking about this for a coupla days and reading what others are saying I have modified my thinking and thought about the fact that while the receptacle might not be in a wet location and not be subject to water or driving rain, due to the location on the screened in porch, there is still a very good posibility that the floor would be wet and possibly provide a path to ground. The receptacle is certianly outdoors because if it were indoors we'd need more than just the receptacles on the house wall. Assuming that, I have taken a definite stand for needing GFCI protection and would write it.
