As previously noted the web dialog from the plugin can actually be used external to SketchUp to explore gambrel attic geometry:
Imperial Units:
http://design.medeek.com/resources/gambrel/web_dialog_gambrel_attic.html
Metric Units:
http://design.medeek.com/resources/gambrel/web_dialog_gambrel_attic_metric.html
I might develop this into a web based app which would allow one to generate 2D AutoCAD geometry (.dwg) of the truss profile.
Imperial Units:
http://design.medeek.com/resources/gambrel/web_dialog_gambrel_attic.html
Metric Units:
http://design.medeek.com/resources/gambrel/web_dialog_gambrel_attic_metric.html
I might develop this into a web based app which would allow one to generate 2D AutoCAD geometry (.dwg) of the truss profile.