Gunblade specialization

[Serapy]

Proof?What Nautilus has to do with Gunblades?

Look at the window in the picture. Inside the window, it displays gunblades...

And plus Nautilus is a type of fish, and if you recall, one of the Ultimecia's paintings is SWORDFISH. Since Nautilus displays Gunblades, it's likely that SWORDFISH is another name for Gunblade.

Nautilus/Gunblades/SWORDFISH would be a mere coincidence if only Squall and Ultimecia weren't connected to each other in any way what so ever.

I'm guessing he's self taught.

Obviously. Otherwise, a LOT more students would have been taught how to use one provided by the Gardens and therefore, there would be a lot more students that use Gunblades as thier main weapons.