An inside straight draw, you got 4 cards to hit. Hand A player's best five card s
Four cards of a straight with a card in the middle missing. (ex: If you have a 9 and an 8 and the flop contains a 7, then you need a 6 in the turn or river. If a 6 comes, then you have made the gut shot straight draw.)
A straight made by drawing to a single card that fits in between the cards you are already holding. For example: If you have 10s-9s, the flop comes 8c-2c-6d, and the turn is the 7h, the gutshot straight was made on the turn.
A straight filled "inside." If you have 9s-8s, the flop comes 7c-5h-2d, and the turn is the 6c, you've made your gutshot straight.
A straight filled "inside". If you have Js-10s, the flop comes 8h-7c-2d, you need a 9 to make your gutshot straight.
To make a straight where your draw is "filled". Ie. you have 76, and the flop comes down Q 8 4, and you hit a 5 on the turn. You would have a Gutshot Straight.
A 'straight' without the 'inside' card.
A straight made in the middle. (Ie if you hold J/10, and the flop is 8/7/2 and the turn is a 9).
A straight filled "inside." If you have 9, the flop comes 7, and the turn is the 6, you've made your gutshot straight.