Grace Church School, located on Fourth Ave. between E. 10th and 11th Sts., is scouring sites in the surrounding East Village neighborhood for a suitable space for a new full-sized gym, according to headmaster George Davison. However, says Davison, rumors that the school might build in or on top of the nearby Cooper Station post office at Fourth Ave. and 11th St. can be put to rest. The school was hoping that spot would work, but Davison says it’s just not in the cards.