Gonaepa josianella is a moth in the Gelechiidae family. It was described by Walker in 1866. It is found in New Guinea. Adults are cupreous, the forewings with a gilded luteous stripe along the interior border widening from the base and a slightly undulating gilded luteous submarginal line. The hindwings have a broad gilded luteous stripe, which is acutely dentate along its hind side and contains a cupreous dot.