OLDSMAR — Milosz Gasior poised his hands above the piano, then brought them down with a flourish to hammer the opening bars of the theme song to “The Phantom of the Opera.” His mother, Bozena Gasior, stood beside him brimming with pride. Milosz doesn’t talk much, but is deeply expressive when he plays the piano. A graduate of the Pinellas County Center for the Arts at Gibbs High School in St. ...