Plus, you should assume that there are more GFs in the world than what you encounter. If they made a FFVIII-2, I wouldn't be surprised if they had a few new GFs. Plus, I think at one point one of the people mentions that a while back, they equipped a GF before SeeD, and its air to assume that it could possibly be a GF you never encountered.

BTW, I looked at the topic title before clicking it, and I thought to myself, am I in the right thread?