Paladin Gunny is in charge of training initiates and turning them into hard-nosed Knights and Paladins. He is unhappy with Elder Lyons's method of taking on volunteers from the wasteland, but still performs his duty to the best of his abilities.
He can be found in the A ring just outside the lab in the council room, outside in the courtyard training recruits during the daytime, or inside a dormitory in ring B.
If permission is granted by Elder Lyons, Gunny can train the Lone Wanderer to properly use and wear power armor. However, Gunny does not like it as he clearly states, "Yeah, I can train you. But don't ask me to like it. My initiates sweat blood, and you just get a free pass?"
He has a low opinion of the Enclave and their tactics, and will readily voice these opinions if inquired about them.
Paladin Gunny was part of the original Brotherhood of Steel group that traveled east with Elder Lyons into the Capital Wasteland.
"I am charged with the duty of turning these maggots into Brothers of Steel. With the threat of the Enclave, they're likely going to be pressed into service before they've taken the oath. So, I've got a lot of work to do."
"Gunny" is a play on the common nickname for United States Marine Corps personnel holding the rank of Gunnery Sergeant.
pcps3 Sometimes, when talking to him, the subtitles will say, "Nothing to report here," but he will say, "We've got this area locked down." This can also happen to unnamed Brotherhood of Steel members. This bug appears only if Broken Steel is installed. [verified]