GocArc — Simple elliptic arc.
GocCircle — Circle.
GocEllipse — Ellipse.
GocGraph — Graph.
GocLine — Simple line.
GocPixbuf — Pixbuf.
GocPolygon — Polygon.
GocPolyline — Multi-segment line.
GocRectangle — Rectangle.
GocText — Text.
GocWidget — Widgets.