gpo does not seem to have a delete command.

It would be useful to have available to include in a shell script, such as one that connects to a network, has gpodder delete episodes older than (x) days, then download new episodes.

Also, I wonder if instead of specifying deletion by how many days old any may be, if during subscription for a particular podcast it could be set for how many days to typically keep before deletion (or marked for deletion). Some podcasts of short time-relevance such as newscasts don't need to be kept more than a day or so; some like long weekly shows would be nice to keep for 6 days or so until you have a chance to listen.