Thanks, man!
The GRE Help is very vague about this and your answer was spot on!
So, in the future, everyone who needs to recover a linux file via GRE have to keep in mind that this must be done via NFS, exporting the desired folder (configuring the file /etc/exports with the target folder that you want to recover your files), just like Ranjith said.
Thanks again, Ranjith!