I think it would depend on how badly they were frozen. Many people get volunteer squash plants in their compost piles. You could always do a germination test if you have plenty of seeds. Put a few between damp paper towels in a baggie, set them in a warm spot(like on the fridge)and see if they sprout. It should only take a few days to find out.

One year I got volunteer MINI pumpkins from the compost. Those cute little 6" guys. It was great! I only ever bought a couple from the store for decoration then composted them when they went bad.