A gfs file extension is related to the GGFileSPlit file fragment. Probably obsolete format.
There is one other file type using
the GFS file extension!
.gfs - Microsoft SharePoint WorkSpace Groove remote data
GFS file extension - GGFileSPlit file fragment
What is gfs file? How to open gfs files?
File type specification:
The gfs file extension is also related to some old file splitting program called GGFileSplit.
Most likely some old format without support from developer. No further information could be found.
This gfs file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.