A 17-year-old student at Massapequa High School died of bacterial meningitis yesterday. Michael Gruber had gone to bed with flu-like symptoms on Wednesday and on Thursday morning his parents were unable to wake him up. He died at New Island Hospital. Gruber was also in the St. Rose of Lima Catholic Youth basketball league and worked part-time at a King Kullen in Massapequa Park. The Nassau County Health Department is notifying people who had close......