Gunbreaker is more Siefer than Squall. A disappointing realization.

[Jandor]

Well that is how the Gunbreaker Job NPC describe Garlean Gunblades being a Gun with a sword attached to it.

Thinking back on that line makes me laugh, you literally fight a garlean gunblade user that the job NPC is already familiar with in the 70 quest, describing his weapon as just a gun with a sword attached seems to be doing it a massive disservice.
Think maybe our job trainer was a little bitter about being a prisoner all that time (which would be more than fair tbh.)