I just searched for this topic. I'm planning to buy several sets of guitar strings but I know that the tropical climate in which I live will have destroyed them before I use them all. The tropical moisture seems to find its way into every sealed container.
Someone commented that the freezer is a very wet place. It is not. All air-born moisture has turned to frost. It is the driest place available that I can think of. My enquiry was more to see if years of cold temperature could damage the strings. I don't think so, as low temperatures are going to slow down any chemical reaction also.
I didn't find a clear answer to my inquiry here.