@brunopostle I did a bit research. #Revit has an extension for #energymodeling and options for #gbXML export through #Dynamo. #Rhino has #Honeybee and #Ladybug as energy extensions to #Grasshopper. #BIMServer can extract geometry from #IFC and serialise it as gbXML. #IDA-ICE imports IFC directly. What about #TopologicSverchok, can it extract geometry and export it as gbXML?