A modification of the commonly-used acronym "DKP" from the popular MMORPG World of Warcraft, GKP means that the items found in an instance will be auctioned off to the players for gold.
The G stands for "Gold," and since KP normally stands for "Kill Points," the new acronym doesn't really make sense. Still, it successfully makes its point.
GKP runs, although very common on my server, Gorgonnash, are not very common elsewhere. It won't be long before they are, though, since GKP is a great system for the casual player.
"Lysandar: Omg! I got FIVE pieces of Nightslayer in that MC GKP run!
Dragkon: WTF?! NO WAY!
Lysandar: Rofl, yeah! And get this: I was the only rogue who needed them, so I got them all for the 50 gold minimum bid!
Cheerful, caring, intelligent, wealthy, handsome man. An absolute driving god, but prefers not to publicly display this talent. Men want to be him, women want to be with him.
You see that James Bond lookalike over there? That's a gkp.