A man who dropped out of a Christian institution 15 years ago will not be allowed to return after officials found out he was gay, saying he did not "adhere to biblical truths."  Gary Campbell, 35, left Clarks Summit University (PA) in 2003. He'd enrolled in 2001, knowing he was gay but believing he could change his sexuality, he has said in previous interviews. In an attempt to save money, he dropped out just six credits shy of earning his bachelor's degree and instead tried to attend a two-year college.  This fall, after 19 months of sobriety, he attempted to rejoin Clarks Summit, part of his plan to stay clean, according to news reports.