Most likely your great-grandfather was born where his wife and children were born: Kargow, Galicia. The place does not appear on maps now. It probably has been incorporated in a neighboring place. Records show it was in the parish of Radlow (Radl~o~w), a town about 15 km northwest of Tarnow. You are lucky. Your local Family History Center has access to records back to 1609.
Use the place search:
http://www.familysearch.org/Eng/Library/FH...ameset_fhlc.aspKosciel rzymsko-katolicki Parafia Radlow (Tarnow)
==Ksiegi metrykalne, 1609-1995; Microfilms: Roman Catholic parish register transcripts of baptisms, marriages and deaths for Radlow, Galizien, Austria; now Radlow (Tarnow), Krakow, Poland. Text in Latin.
==Kopie ksieg metrykalnych, 1784-1865: Microfilms: Catholic parish register transcripts of baptisms, marriages and deaths for Radlow, Galizien, Austria; now Radlow (Tarnow), Krakow, Poland. Text in Latin and Polish.