Licensing options for this format begin with FME Professional Edition.
The (Bentley) MicroStation GeoGraphics Reader/Writer is nearly identical to the Intergraph MGE Reader/Writer.
The only difference is that by default, the format shortname for the MGE reader is MGE.
Refer to the chapter Intergraph MGE Reader/Writer for specific information about both the GG and MGE formats.
Overview
FME provides reader and writer access to design files and their associated databases. This chapter assumes an operational knowledge of MicroStation GeoGraphics.