I make all of my baked goods with whole wheat flour...it's got the WW flour texture but things seem to come out fine..yes, have done gingerbread too. Sometimes I'll use more wet ingredients to get a finer texture. I made a gingerbread house last year and it worked just fine. Jami in WA
Maybe try running the flour through a food processor or blender to make it a little finer, I have heard of people doing that to regular flour to make it lighter like pastry flour for baked goods. I also have used whole grain flours, mostly spelt, with baked goods and had a pretty good result.