Guest relations Offices (GRO) can be found just outside and inside every theme park, and the Transportation and Ticket Center at the MK parking lot, and at the International Gateway at Epcot.
Noirmally the ticket windows will open about one hour prior to Park opening. However, the Guest Relations Office (which also handles tickets) will open at least one half hour prior to any Guests being allowed in the Park.
Also, at the gates of the water parks and at two locations at Downtown Disney (Marketplace and West Side.)
You can also deal with most ticket matters (other than Annual Passes) at the lobby concierge desks or ticket windows at all the WDW resorts.
All Guest Relations windows can give you any of your Will Call tickets.
There are no "real" tickets sitting anywhere waiting for you.
GR simply calls up your e-ticket info on the computer and instantly prints tickets and hands them to you.
There are two Guest Relations offices at DTD.
One at the Marketplace and one on the West Side.
Marketplace:
Walk-up counter located between Team Mickey shop and Ghirardelli Chocolate, at the Rainforest Cafe side of the Marketplace.
The West Side:
Now at the Disney Quest location.
Guest relations Office (GRO) windows/counters at the parks open approx. 45-60 minutes before the scheduled opening time for the day (AM EMH included.)
GRO will remain open until most guests have departed, after closing time (PM EMH included.)
GROffices at DTD are open with the hours of DTD (until 11pm weeknights, 11:30pm on Fri. & Sat.)