Wrap it really, really well or it will taint other things in the freezer.
I'm not sure what is wrong with the cloves opening out. They will be fine unless the skin covering the individual cloves has come off; which would be exceptional and quite outside my experience.
I usually store my garlic, once it has dried out in mesh onion bags. I'm still using last years harvest. There is a green shoot inside the clove which I discard but otherwise the garlic is fine.