CGM format (Computer Graphics Metafile) can be exported to a variety of both raster and vector formats, preferably vectors to preserve the data. This can be possibly done in some graphics editors, but you may also find a dedicated utility for handling CGM format, called SDI Convert.
Convert Computer graphics metafile to AutoCAD DXF Drawing Exchange Format.
We found 4 software records in the database related to .cgm to .dxf file format conversion.
Microsoft Windows software - convert cgm to dxf on Windows
A drawing software used to create technical illustrations and graphics
Convert from cgm file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned cgm to dxf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A CAD CGM converter
A set of applications used by professional graphic designers
Multiplatform software - convert cgm to dxf on any platform
A vector graphics editor