Oh, I see! Thanks for the explanation!

I actually think the main hurdle you would face in your attempt to go national is the fact that you are a christian sorority. While your religously affiliated school probably likes the idea, many schools wouldn't like a sorority that limits its membership only to Christians. Many GLO's historically were alligned with one religion or another but eventually had shed rules requiring members to be of a particular faith because universities would no longer allow such rules or because it wasn't considered politically correct to have such rules.