All of GNV's airlines are now accepting eboarding--electronic boarding passes on smart phones. Delta, US Airways/American Airlines and Silver Airways as well as the TSA checkpoint now have the capability to read eboarding passes.
Eboarding is a great convenience (and saves paper.) Passengers will still need to check in for their flight prior to the 30 minute window before flight departure. Also note that boarding gates close approximately 10 minutes before scheduled time of departure. Please plan your trip accordingly for a stress free visit.