Just as the name suggest its a graal version of bingo. My idea would be for vip's only to receive a graal-ingo card (in their inventory) with numbers on it, and everyday a new number will be drawn at random. If a player has the number on there card it gets marked off. One number will be drawn everyday until there is a winner. The rules can be changed or set for the current game and changed after a winner is declared and a new game is started. for example: the first time around when ever some one gets a row of numbers up,down,or diagonal they win but the next time graal-ingo starts you have to get all the numbers to completely fill the card to win. prizes can also vary gralats,hats,ect. (i made it vip just to add another vip benefit).

could also do this as a house mini game where its like 50g's a game. A npc calls out numbers at random in the gc chat box when your entered into the game. You push out the numbers on your card that have been called to mark them out winners receive 250g's. with there being big prize games randomly mixed in where you have to completely fill out the card to win. prize is 1k g's. could put this on oasis island so it would be a vip only mini game.