I don't have a single clue about Green Building Studio, but I thought I might mention a couple of other things related to going from an EnergyPlus model to an eQuest model:

• SIMEB from Hydro Quebec should be able to translate your geometry from an IDF file to an eQuest INP file.

• NREL also created an IDF to INP converter, but that only works for constructions. You can read more here[here](http://bim-source.com/2012/05/idf-to-inp-converter-for-nrel-bcl/

Note: if you wanted to go the other way round, the BTAP from Openstudio standards is what I'd use. But read this post eQuest Geometry to EnergyPlus too.