Take Monorail from Epcot which will stop next at Ticket&Transportation Center where you will cross the platform to get on the Resorts Monorail which will take you to Grand Floridian. Usually there is no wait for the Resorts Monorail; it is usually there waiting across the platform when you step off the Epcot Monorail ( if it isn't there it will be in under 5 minutes).