The gassy smell is actually hydrogen sulphide, which is a byproduct of overcooking your eggs. They are still edible and will taste fine, but the yolk will be a bit more crumbly. Just store the eggs in the most airtight a container you can. I like to double bag them and then place in a tupperware container. But don't worry, the odor will go away after you remove the eggs from the fridge.