@neeger,
Well the thing you are talking about is mostly autodl-irssi
You just set up some filters and your torrent client will automatically download torrents specified by your filters.
For example, if you add Quantico to the filters, your client will automatically download every new torrent having name Quantico
You can set up minimum and maximum size of the torrents to be fetched.
And its not limited only to Gazelle trackers, you can set autodl on most trackers (some trackers don't allow autodl)

I hope it was autodl what you were talking about.