GDB files

.GDB is the standard suffix used for Borland InterBase® database file names. It originates back to the days when the Interbase Corporation was still called Groton Database Systems.

This is not compulsory, in fact an Firebird or InterBase® database may be named with any suffix. This standardization does however provide a certain conformity, of particular importance if a database is to be administrated long term by numerous people.