Hello Josh and welcome to the community!
I would create a separate backup job for each Server Group with the corresponding schedule.
Am I correct saying that you need GFS retention
on tapes only?
If yes, you can create a media pool called “Weekly” with retention period equal to 4 or 5 weeks, configure a backup to tape job and point to the “Weekly” media pool, choose those backup jobs as the source and schedule the tape job to run on weekly basis. This way all backups created during a week will be moved to tapes.
joshwinters wrote:I tried looking at backup copies - but I'm concerned about how much duplication I'm going to get on our disk by doing that.
Do you mean copying backups to the same disk repository with enabled hardware data deduplication?