I am creating a game where when the ball hits the block you get a point on the gui text score. But i do not know how to script it so please may i have a script to put on gui text and another script
Start here. http://unity3d.com/support/documentation/Components/GUI%20Scripting%20Guide.html
When you have a specific problem, please ask and we will be happy to answer. You need to at least try to write the code, this is not an outsource service.
When you are done with the GUI Scripting guide, this will be no problem for you and you will be much more productive in your game design.
So wait, you pretty much want us to make your game for you? I wont give you a script, but the easiest way would probably be to convert your GUIText into an integer, add 1 and then back again. Unless you understand variables, in which case your life is easier.