So Constance is not a real school it's made up. The author of GG went to Nightingale-Bamford School on 92nd Street in Manhattan and that's what Constance is based off of. St. Jude's is not a real school either. The Museum of the City of New York is used for exterior shots St. Jude's School For Boys and Constance Billard School for Girls. The Museum is located on Fifth Avenue in Manhattan, between 103rd and 104th Streets, facing Central Park. Hope that helps.
posted over a year ago
In the first half of Season One, the interior and exterior was shoot at the Packer School, Brooklyn.