this is a general question, but the answers should be case by case in my opinion.

there are several feats through the game that are for ranged attacks, i.e focused shot. now focused shot requires precise shot as a prereq which IS applicable to guns, my question is, that some feats do not explicity say they can be used with firearms, i think that these should either allow firearms or be discussed.

http://www.d20pfsrd.com/feats/combat-feats/focused-shot-combat

focused shot is the feat in question.

i realize that other feats have no place in this arguement, ie stabbing shot,where you make a melee attack with an arrow specifically. my question refers to shots that may not have had wording updated to reflect firearms.

Well, IMO the feat states pretty clearly that its for Crossbow and Bow....where as the prerequisite feats are general ranged attack feats, thus making them applicable to fire-arms.

I really don't care either way, but as written I don't think it applies to Gunslingers. The verbage is not out of date either, Gunslinger and this feat are from the same book. 

Edit: Im a retard, feat is APG, Class is Ult. Combat. 

Edit 2: Ult. Combat was released in August of 2011. APG was released October 2010. So its possible verbage is out of date. Should probably have an actual discussion about this.