How will you be turning the gas system off? If its a adjustable gas block pretty sure that will be a no no with the PGC, gun has to be modified so that it can't be switched back on easily.
Gas system is turned off at the Superlative Arms Gas Block under the handguards.
"Pretty sure" doesn't feed the bulldog. Cite case law please.
From Title 34 Section 102 Definitions:
"Firearm." An instrument used in the propulsion of shot, shell, bullet or any other object by the action of gunpowder exploded, explosive powder, the expansion of gas or the force of a mechanical device under tension.
(1) "Automatic." Any firearm which discharges more than once with a single pull of the trigger.
(2) "Semiautomatic." Any firearm which reloads without aid of the shooter, but fires only once with a single pull of the trigger.
My pistol is a firearm. With the gas turned off my pistol is NOT, by definition of Title 34, a semi-automatic.
The section does not read "Any firearm originally designed to reload without the aid of the shooter".
If it does not reload without the aid of the shooter (which it won't with the gas turned off) it does not fit the definition of "semiautomatic" and is therefore a manually operated firearm.