@leilei
I just read something in the ArchiCAD GDL reference guide that may interest you.
There is the possibility that you can use volume3D() in Property Script, use Text/data GDL add-on to export your results from within the Property Script, then use the same Add-on to import the data.
It's a long way.
A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.