In this blog post, I explained different uses of GO command

Here is a Fun when you use GO as object name

CREATE PROCEDURE GO
(
    @I INT
)
AS
    SELECT @I AS number

Well. The procedure is created and let us try to execute

GO 2

What we see is

Command(s) completed successfully

Becuase it becomes a syntax to execute a batch for two times

EXECUTE GO 2 

Result is 2

Now see what the results are for the following

Execution 1
[GO] 2

--Execution 2
[GO] 2
GO 2

--Execution 3
[GO] 2
GO
EXECUTE GO 2
GO

--Execution 4
[GO] 2
GO 2
GO 2

--Execution 5
[GO] 2
GO
GO

--Execution 6
EXECUTE GO 2
EXECUTE GO 2
GO 2

--Execution 7
[GO] 2
GO
GO 2
GO 2
EXECUTE GO 2
GO
GO 2
GO 2
GO 2 
--Execution 8
GO;

--Execution 9
GO;2

--Execution 10
GO 2;