Just because I have spent the better half of an afternoon trying to work out how to easliy import many GML files from an external system that spits out GML files feature at a time.
Model Builder failed and I was about to try my luck with whipping some python snippet up..
luckily I found that you could use a wild card in the file path of the GML files...
ie C:\bla\bla\bla\*.gml
[ATTACH=CONFIG]19595[/ATTACH]