Hi,
first this link just in case :
http://www.frecle.net/forum/viewtopic.php?t=542
I'm not using Gile(s) often (curious about the update "soon to come" though), and I think I've never directly imported an AC file into that lightmapper.
Now, as far as I can remember, I did use another app to texturize the building.
That app is called DeleD (I probably exported an OBJ file from AC3D to load into DeleD).
From DeleD I'm pretty sure I've exported a B3D file (Blitz 3D native file format), and imported that B3D file into Gile(s) with no problem.
But I can tell for sure for 1/2 sided surfaces.
There's a free version of DeleD (LITE), and the B3D exporter is also free :
http://www.delgine.com/index.php
http://www.delgine.com/plugins/viewP...desc=Exporters
Now I also know Ultimate Unwrap 3D that is able to import AC files and export B3D files, but it's not free (google it).
HTH