Gate checking means you'll leave the stroller at the gate or jetway before you board the airplane, and it will be waiting for you as you exit the plane after the flight. (thespruce.com)
Virgin Atlantic invites Upper Class passengers to board first and there's a separate jetway for business - class passengers (a sign directs premium economy and coach passengers to the next door). (frequentbusinesstraveler.com)
SFO spent millions to accomodate the A380 with three separate jetways — two for economy passengers who enter on a lower level, and one for business and first class passengers who enter from the main level. (travelskills.com)