Hello everyone :)

Is there a way that you can create a GUI that has the position of the mouse?

E.g:

function OnMouseOver ()
{
//Set stuff to true;
}

function OnGUI ()
{
if(stuff)
   {
    //Set GUI at mouse position.
   }
}

I do know how to create the GUI and all that but, I have no idea how to create the GUI at the position of the mouse.

Can you please help me? :)

You could use Input.mousePosition to get the position in pixel coordinates (screen coordinates) and then use this values to draw your GUI.