A friend and I recently (early September) had facials at the GF spa. It was expensive ($109 for 50 minutes, plus tip) but VERY worth it! We had separate rooms, I'm not sure if they can arrange to have you in the same room, if that's what you want. You could call and ask, they're very helpful.
Also, if this is your first time...they have sauna and jacuzzi facilities for use, but for some of the treatments (including facials) they recommend that you don't use them for at least 30 minutes after. What we would do next time, knowing that, is go very early to use those, then take a shower before the treatment.