Looking for Gilroy from Ireland Don T Know County Emigrating to US

My g-g-grandmother, Anne Gilroy, daughter of Patrick and Mary Jennings Gilroy, b. 1850 in Ireland. Married John Oakley in Ireland or England, had son David in 1869 in Englad, family said to US same year. settled in Scranton, PA. Had four more daughters, MaryELlen,Beatrice, Kate and Anna. Husband naturalized in 1878. Died 1925, buried in Catholice cemetery in Lackawanna Co., PA.

Don't know if she had siblings come over. Would love to find out which county she was from, and where she and John Oakley were married.