Green Mountain Gaps Solitaire is a row ordering solitaire card game with a fun Green Mountain Frontier theme. When you play Gaps, you are trying to order 4 rows of cards from 2 - King by suit. You do this by moving cards into the Gaps that have been created by removing the Aces. A card can be moved into a gap if it's value is one more than the card on it's left and is the same suit, or one less than the card on the right and has the same suit.