A support of Firebird / Interbase has to be brought for GF.
Firebird is the opensource branch of Interbase, quoting their sites :
Â« Firebird is a relational database offering many ANSI SQL standard features
that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers
excellent concurrency, high performance, and powerful language support for
stored procedures and triggers. It has been used in production systems, under a
variety of names since 1981. Â»
Firebird is bundled on all Sun Cobalt products.