Various map and navigation formats can be usually converted between each other, you just need to find a proper utility that allows this conversion. A lot of .map files are supported by the MAPC2MAPC utility, which also offers export to KML format (Google Earth), so it should be a natural choice for this conversion.
Convert OziExplorer map file to Google Earth Keyhole Markup language file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert map to kml on Windows
A digital map conversion software
Convert from map file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.