A NPC, or non-player character is any character within the game that is not controlled by the player. This includes Zombie and other survivors. In the future, NPCs will be able to display a variety of different personalities and characteristics.
This section is likely to contain major spoilers pertaining to the story of Project Zomboid.
Gun nuts are human (non-zombie) NPC survivors. They are always hostile toward the player character, though they typically shout warnings before attacking. When killed they drop whatever items were on their person, including clothing, weapons, ammunition, and other items. Gun nuts will also fire on any nearby zombies.
Story Mode Locations
This Gun Nut will come to the player's safehouse toward the end of the tutorial. After the player listens to the radio message (and turns the oven off, preventing a fire), Bobby Collins will approach the safehouse and enter, tearing off any barricades. If not killed or attacked, Collins threatens the player and then directs them upstairs. After directing the player inside the bedroom, Collins will claim that Kate Smith is infected, then despite the player's protests will shoot Kate Smith and the player. Should the NPC miss or otherwise not notice the player, he will proceed upstairs to threaten then kill Kate.
This Gun Nut is found patrolling the inside of the grocery store. Bloggs will begin shooting at the player if they enter the store.