Also, more info c/o ABC News:
Viewers interested in joining "GMA" in Central Park are encouraged to arrive at Summerstage Rumsey Playfield via the 72nd Street entrance on Fifth Avenue at 6 a.m., when the park opens to the public.
With the exception of Lady Gaga being a free, ticketed event, all concerts are free and open to the public and will take place live during "Good Morning America," Fridays from 7 to 9 a.m. ET. Dates and additional acts will be announced throughout the summer.