When exporting to GeoMedia Layout Sheets using a named legend that contains commas such as "Scalable Map (1:20,000,000)", the commas are being changed to underscores "_" which is invalidating the import process. The imported GeoMedia Layout Sheet (.gls) file contains an empty map frame and no legend is generated.
This is expected behavior. Commas are not allowed in Map Window names. Do not use commas in Master Legend names if you are creating a .gls file.