I have a gift card that has 50 dollars on it and I dont eat here , could I go to the restaurant and get the cash out of the card instead

The food is worth spending the $50 there to eat. I believe you will like the food. There is something for anyone's taste buds!

You could try selling it.

No you can not, however there are "brother/sister" restaurants by the same company that you could most likely use the card at as well.

Doubtful

Good question but I bet the answer is No.