Once everything is correctly installed, it is time to see GNOME-DB in action. Before doing so, though, there is a last thing you must do, which is to add the directory where you installed GNOME-DB libraries to your LD_LIBRARY_PATH environment variable, and the directory where the binaries are placed to your PATH environment variable.
Then, just run one of the included applications, such as gdafe (the SQL Front-End), gda-mgr (the GDA configurator) or rolodex (a sample rolodex application that shows how you can easily use the GDA API to make your own applications).
If you want to develop applications using GNOME-DB, run the GDA Builder, which is a complete IDE for developing GNOME-DB applications, or have a look at the API documentation and at the included sample code to see how you can integrate GNOME-DB in your applications.