not sure what you mean by "as composite"
If you want a live link, you should script a proper GDL object for NURBS geometry. This is the hard way.
If a live link is not a priority, you always can save it in a 3dm file, and open it directly in Archicad. But again, it will be imported as GDL object.
May you should think how this geometry is going to be constructed, in order to rationalize those double curvatures. Once rationalized in planar faces you should now pass them to ArchiCAD without problems, may as roof elements.
Triangularization is easy, planar quadrilateral faces are possible, but much more complex operation required. Kangaroo plugin is of great help for rationalization operations.