Help me understand the Gun show loophole. From what I understand, an individual can sell their weapons at a gunshow without running a backround check. Does this also mean they can sell their weapon without needing to go through a person/business with a Federal Firearms License to complete the transfer?

In other words, can I sell a Glock Pistol to somebody who says, "Hey, I’ll give you 0 bucks for that Glock", and just take the money, give them the gun and call it a day? No paper work, no checks, no license, no nothing? Is that the Gun Show Loophole?