in folder with XS++. For example, SETool save gdfs next setool2.exe

XS++ creates a folder with the name Backup near the XS++.exe
Inside the Backup folder should be the *.bin file, which is the saved GDFS.

If you can't find it, try a search on your hard-disk with this keys: *GDFS_BACKUP.bin
This should locate your GDFS.