Detail
Type Ein. - Gruber is a Einöde (Outlying Farm).
BA Pfarrkirchen - The Bezirksamt for Gruber is Pfarrkirchen. The Bezirksamt is the District Office.
See Hirschbach - A See notation means the entry is dependent on another entry. In this case, Gruber is dependent on Hirschbach, which should be consulted for additional information.