Quote Originally Posted by Rhi
its easy you can complete the game on level 1, no worries
Easy, you say? I'd like to see you complete a Lv 1 game considering Squall starts at Lv 7 and Quistis at Lv 8.

Basically follow what Mo-Nercy said in the above post and all should go well. To level up your GFs without levelling up your characters just junction them to (SPOILER)Seifer or Edea and let them level them up for you. To gain AP without the risk of levelling up fight Cactuars in the Kashkabald Desert or Cactus Island (the small island next to the desert). Each Cactuar offers 1-3 EXP and 20 AP.