Is GOD a "Necessary Being", one that MUST exist?!?

Must GOD exist by 'Logical Necessity'?  

While most atheists would immediately cry "Ridculous! Absurd!", or even stronger expressions of disagreement, the question must be thought through philosophically.  

The question is this:

 Are there any arguments/lines of reasoning that are sound, and terminate with the conclusion that GOD must exist, as a logically Necessary Being, one that is the foundation for certain features of reality such as existence, morality, and necessary truths?

Listen, learn, and remember.... have an Intelligent Faith!

- Pastor J.