Anythins is possible in MMA. So ya, GSP could win, but not likely. I think you are right though, and if he were to win it would be how you describe. And Silva is unstoppable right now, in his division. Much like it appears GSP is in his division.
As much as I like GSP, I would have to put my money on Silva. I think Silva would would be able to land some serious strikes on George, and I don't think GSP has the greatest chin.
Where did you hear this? Do you have a link? If true that just shows what a great fighter GSP is. Always wanting to fight the best. That would be one tough challenge though. I wonder what weight GSP and Silva both normally walk around at? Anyone know?