Not sugar syrup! That's MADNESS! Make up some royal icing (it has dried egg white or somesuch for rock-hard setting) and squeeze it out of an icing bag/plastic bag.
I'm planning to make one this Christmas - I made one several years ago and I think it took me most of a day (strangely enough, I haven't made one again recently) but it was worth it. You can't stop adding bits to it. Mine had a bicycle torch inside with switch-access through a small gingerbread lean-to construction at the back of the house. You could turn it on and the boiled-sweet windows glowed. And there was a christmas cookie in the shape of a christmas tree indoors, too.
God I sound sad!
I ate most of it, eventually. Stale gingerbread is surprisingly nice.