I don't like the Gunblade, I don't think it really fits in with FFVIII's world. I think they could have made it fit in, but for such a unique item it gets very little text time.
I think they mention that only Squall and Seifer use it, and that it's quite an outdated weapon (Laguna flashback), so it makes me think why they even bother mentioning it, and don't just treat it like every other party weapon.