Import center lines, REVIT to RAM SS using ISM?

Is it possible to import 'other lines' (center lines marking the location of shafts), which are not Grid lines from REVIT to RAM SS using the ISM repository? I am aware of the process of importing the lines marked as GLs from REVIT to RAM SS. But I am unable to import the 'other lines'. Any solutions is much appreciated! 

Thank You!