| Function | Description |
| findWidgetByType | Find widget in hierarchy by type |
| gdkFlush | Flush Gtk events |
| gdkGetWindowSize | Obtain dimensions of a Gtk window |
| .getAutoMethodByName | Locates Gtk class methods for an object |
| getSignalInfo | Information for all signals for multiple classes |
| gtkAdd | Add Gtk wdget to parent container |
| gtkAddCallback | Register and control a function as Gtk event handler |
| gtkAddIdle | Control a background/idle function |
| gtkAddTimeout | Control a periodic/timer function |
| .GtkCall | A Gtk-specific .Call() |
| gtkCheckInherits | Verify an object's class |
| gtkChildren | Get child widgets of a Gtk container |
| gtkComboSetPopdownStrings | Interface to Gtk routine. |
| gtkDragSourceSet | Set a widget as a potential drop source or destination. |
| gtkGetType | Get the GtkType object from a Gtk object or name |
| gtkInit | One-time initialization of Gtk environment |
| [[.GtkObject | Access a value within a Gtk object |
| $.GtkObject | Find methods for an S-Gtk object |
| gtkObjectGetArgs | Access properties of a Gtk object |
| gtkObjectGetClasses | Dynamically Computes class information |
| gtkObjectGetSignals | Retrieve information about available signals |
| gtkObjectRef | Increment and decrement GtkObject references |
| gtkObjectSignalEmit | Emit a Gtk signal from a Gtk object. |
| gtkSelectionDataSet | Fill this in later |
| gtkShow | Show/realize one or more Widgets |
| gtkSignalGetInfo | Reflectance information about a Gtk signal |
| gtkTargetEntry | Create a new target for drag-n-drop(?) |
| gtkTextGetText | Access contents of Gtk text widget |
| gtkTopWindow | Create a Gtk Window |
| gtkWidgetGetAllocatedSize | Obtain dimensions allocated to a Gtk widget |
| gtkWidgetGetFlags | Set and get GtkWidget flag values. |
| names.GtkObject | Access information about properties of a GtkObject |
| print.GtkType | Produce prettier output for a GtkType object |