GConf Reference Documentation

GConfEngine - a GConf "database"
GConf Core Interfaces - Basic functions to initialize GConf and get/set values
GError - error reporting.
GConfValue, GConfEntry, GConfMetaInfo - A GConfValue stores a dynamically-typed value. A GConfEntry stores a key-value pair. A GConfMetaInfo stores metainformation about a key.
gconf-schema -
GConfChangeSet - a set of configuration changes to be made.