Location: Training Centre
Scan Info: A large, insect-type monster that is a survivor of some ancient race. Uses its large spikes and tail to attack.
HP: 1314-9700
Very weak against: None
Weak against: Wind
Strong against: None
Very strong against: None
Has no effect: None
Absorbs: None
Draw Possibilities: Sleep, Blind, Confuse, Shell, Silence (level 30+), Pain (high level)
AP Gained: 5
Items Gained: Wizard Stone (4)
My tips: This one is a bit different in that it doesn't attack you directly. Instead, it uses the three Raldos to attack you (a Raldo is a rock-like monster).
The first thing to do is to Draw-Cast Protect from the Raldos onto on Squall and Quistis. Also, Stock some Protects for later.
Next, concentrate on attacking the Raldos and putting them out of commission. This will stop the Granaldo from throwing the Raldos at you and force it to attack you itself.
It's not really all that hard. Don't forget to Stock plenty of Shells from it. Pain, too if your characters are able to (and it is there to select, I've never seen it, though).
If you're in a hurry, just Boost up Quezacotl, Shiva or Ifrit and get them to finish them all off at once (not Siren, though - her attack strength is too weak). One of the easiest boss battles in the game, although I prefer to keep this battle going for a bit instead of just blasting them all to hell.