Just my opinion
as Fire/EMS, we should already have some idea about how to deal with firearms and other weapons on pts. I worry about some drunked up, methed out squirrel with his $50 piece more than I'll worry about about Joe Citizen with his licensed conceal carry gun.
Think about it this way, most likely, if a pt has a gun on his/her person, and is incapacitated, if the gun was going to go off, 99.99% of the time it would have already. Guns are inanimate objects. They need human intervention to make them go bang. For a gun to have an accidental, random discharge without a finger on the trigger takes a ****ed weapon with a very light trigger pull. If a pt has a glock stuck in their wasteband, and needed immediate transport, I probably wouldn't delay transport waiting for a LEO.
No offense to the leo's here, but this advise about "the LEOs know all about guns, they'll handle it" aint always true. In fact, on the two most recent runs I've had involving guns and pt's the LEOs on scene have batted 0. Some cops know a lot about guns. Then there are the ones who refer to the 9mm as "high powered".
Here is another Idea - have your local NRA trainer, or police trainer, or someone from a gun dealership give you a rundown on guns.