Our GIEP team meetings typically include DH (if he can get time off work) and I plus the principal, primary teacher, gifted teacher, and school psych. If other secondary teachers need to be involved they sort of rotate in and out when someone can cover their class. Our last meeting was primary teacher, gifted teacher and me - that's it. Now that I think about it the school counselor hasn't even ever sat in on a meeting. One would think he/she should be there.
I guess if all the teachers that have DD in class during the day were all at the meeting then there would be about 10-11 total (including DH and I).