An affable blond actor with choirboy good looks and an unmistakably mischievous air, Gabriel Mann worked steadily with supporting roles in independent films in the 1990s, breaking through to more starring parts and bigger productions as his experience advanced and his profile rose. Having trained with Sanford Meisner at the Neighborhood Playhouse and appeared in such productions as "Return of Ulysses" at BAM and "Potato Creek Chair of Death" at the Ensemble Studio Theater, Mann (who is occasionally billed as Gabriel Mick) began working in independent features. 1994's "Parallel Sons" would mark