A first! Candidate lists sexual orientation as ballot designation.

Longtime gay activist and BART District 9 board candidate Michael Petrelis is believed to be the first person to use LGBT as part of his ballot designation. (Photo: Matthew S. Bajko)

A San Francisco candidate for a seat on the board that oversees the regional BART transit agency is believed to be the first to use the LGBT acronym as his ballot designation. It may also mark the first time anyone…