Add Gui elements to a scene

I want to add gui elements to a scene. Where are they in the program? I expected to see a toolbox under GameObject, but I don’t see anything.

Presumably you don’t have to do gui layout all in code?

In the Hierarchy view, click the create button, and select what you need to create.
GuiText, GUITexture and anything you could create are listed.

While creating it in code is easy as well, just like creating any other variable.
and then setting its variables like:

var myTexture:Texture2D; // drag a texture to this variable
var myGUITexture:GUITexture;
function Start()
    myGUITexture = new GUITexture();

myGUITexture.texture = yourTexture;