why not provide GFCI protection at the distribution panel?
That's what we'll be getting here from next year as well as the shutters. At the moment, our code requires that any receptacle "likely" to be used to supply equipment outdoors must be RCD (GFCI) protected, but the revised 2008 code is going to extend the RCD requirement to
all general-purpose receptacles. Our RCD is a 30mA trip though, not the 6mA or so of the American GFCI.
Don't forget either that a GFCI will not prevent severe shock or electrocution if somebody gets across line and neutral and there is not a simultaneous path to ground.