<<Disclaimer: Verify this information before applying it to your situation.>>

I haven't tried making GF gingerbread for houses, sut you might try
modifying Bette Hagman's Mock Graham Cracker recipe in "More from the
Gluten-Free Gourmet".  This recipe makes fairly sturdy cookies.  You
could change the honey to molasses and add some ginger and other spices
to make it more like gingerbread.
                                                   Good Luck, Jamie
                                                          Harvey