An automatic group of group owners

Is there a way to have an automatic group which contains all group owners, in much the same way as @staff works?

I’d like to make all my group owners TL2, and to keep track of them as my site (hopefully) grows quickly. Also I want to change their powers as a group as time goes on, as well as communicate with them and have a category for them. I don’t want to make them all mods as they aren’t ready for that.

In the meantime, I can do this manually; however as our tightly managed Forum grows an automatic group would become more and more helpful.

Alternatively, how hard would this be to do as a plugin?