The gnustep-db supports a pluggable database backend mechanism.
The OGo source distribution comes with database adaptors for
PostgreSQL
and
FrontBase,
Sybase and Oracle adaptors are part of the commercial SKYRiX 5 distribution
and not part of the OGo sources.
We at OGo are open to the contribution of additional database backend
adaptors, but having support for a perfectly suitable OpenSource database,
PostgreSQL, we see no immediate need to extend OGo for MySQL or other
database on our own.