I am not sure of the answer to the 1st question, but I would think so. Simply becase Intl' gateway is the link to all the Epcot Resorts/Boardwalk area. In fact, the friendship launches drop you there. But I have never used the Gateway prior to lunch time
As far as Epcot at Opening, the Character Bus pulls up and they sing a song or too before they drop the ropes. We were right at the ropes last year one day, and walked hand & hand with the MS cast members as they led us to the ride.