Larry,
Re: <font color=blue>Can GOD make a rock so big that he can't pick it up?</font color=blue>
Given that in most theistic belief systems, if God exists then he created the universe ... we need to look at the wider problem.
Rocks I don't think would be a problem.
You and me are supposed to be able to handle mountains:
Matthew 17:19-20 :
'For truly I tell you, if you have faith the size of a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you.'
(By the way, stump removal can be handled in a similar manner ... Luke 17:5-6
"The apostles said to the Lord, 'Increase our faith!' The Lord replied. 'If you had faith the size of a mustard seed, you could say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you.'")
When you get to a larger scale, gravity becomes an issue. It's not so much you lifting the rock - as the rock pulling you toward it. Einstein, of course, deduced with his General Theory of Relativity that gravity was a warping of the space-time continuum. This happens to a minor degree for planets - gravity is a 'weak' force (as compared to a 'strong' force like electrostatics).
Going up the scale from planets (small ones are large and rocky, bigger ones are gaseous with metal cores) you get to stars and then strange objects such as the White Dwarf. A White Dwarf is a collapsed star - extremely dense. (A teaspoon of matter from a White Dwarf is estimated to weigh around 5 tons.) Toward the end of the spectrum for gravitational pull you find the black hole ...
... and at the extreme end of the spectrum would be the 'singularity' from which astro-physicists theorize the whole universe emerged in the 'Big Bang'. This 'singularity' represented the entire mass of today's universe in a point source.
None of this is evidence for or against the existence of God. But, if He is around - then I would suspect that rocks wouldn't be a problem. I doubt that the laws of physics would apply somehow. If He exists, He was certainly able to handle that singularity too.
Patrick
P.S. Some would say that from Einstein's famous equation, mass is related to energy etc. Therefore, if God is energy the bigger the rock he creates the less energy he has (conversion of His energy to rock's mass).
I don't subscribe to that - if God exists it would be in some state that we have no way of currently detecting. If God was energy we would have had some kind of blip on some kind of meter by now.