We are creating backups that contain user information. Even though it is created in a closed environment, if there is a breach in our backup systems we would like to make it harder to use the stolen data. We are using GPG as the current solution but I have seen several security people arguing against it.
My understanding is that most of the time these people advising against GPG only for the message encryption use case and not against the file encryption one (especially in a closed system).
Should I consider using something else or GPG is just fine.