1) Do you know what 'gorp' is? Yes (at least, if you mean "a mixture of nuts, dried fruits, and sometimes small candies esp. m&m type used as a quick-energy snack while hiking; also known as 'trail mix'".

2) Is it a term you would actually use, should you be talking about the subject in question? I think I have used it, although I suspect I alternate with 'trail mix'.

3) Where are you from? California