Producing new operas is a mostly-miss proposition. But tiny Central City (Colorado) Opera “hasn’t fared too badly with its handful of commissioned, Colorado-oriented musical tales. Douglas Moore’s The Ballad of Baby Doe (1956) remains in the international repertory. Same thing, on a smaller scale, with Henry Mollicone’s Face on the Barroom Floor (1978). Robert Ward’s The Lady From Colorado (1964) bombed – but two out of three ain’t bad. So, with the premiere Saturday at the Opera House of Mollicone’s Gabriel’s Daughter, one question was unavoidable: Could Central City make it three out of four?”