PCGen does not have an option for the varying firearm frequency levels in Ultimate Combat, which modifies firearm price significantly. In addition to firearm prices, the "Guns Everywhere" setting grants the gunslinger Gun Training at first level instead of Gunsmith.
Various firearm frequency settings would be an excellent addition to the Optional Rules Systems list on the Feats & Abilities -> Misc tab.
This is a pretty broad and far reaching rule, I can do the simple weapon
prof portion easy enough, but the cost is out of scope, As a work
around, use the costless option.
I won't tackle this until later tonight.
I assume the rule citation to Paizo's site is part of the original
request here, otherwise I dislike having to hunt down rules for verification
John is a great guy, and would be happy to know his site is referenced often... But that does not meet our strict publisher source only rule. Book or a site maintained by Paizo please. I have a copy of the UC but if the prd has it, even better.
I'm so sorry! I meant to grab it from the official one and didn't even notice I grabbed the wrong one. Here you go: