Now, Pita Pit doesn't have a secret menu per se. They're all about customization normally, so asking for grilled spinach, steak, and gyrom meat is no big deal. You can even customize orders placed via campusfood.com.
The one thing they have made, however, is called the Heart Attack - gyro meat, philly steak, extra cheese, and bacon. It was created to mock sorority girls who order double meat double cheese with a diet soda.