Been away for a few days to France and realised upon arrival that the online GAR which was filed at the same as my flightplan was in LOCAL time, not UTC, as per the flightplan. Sufficed to say, a very grumpy french customs man met us to complain we were so late! The same was the case on the return, though fortunately we were early to check out the aircraft etc but again the local customs agent had been waiting around for an hour.
I have emailed online GAR, but it would make sense for the gar to use UTC, or for skydemon to populate the fields in online gar in the correct local time?