Hi GC,
You'll probably want something different depending on the exact conditions/task. You will need something to stop your skin freezing to metal at very low temperatures. Gloves that give the dexterity required to open fiddly panels are unlikely to keep your hands warm for long in those temperatures. Polar explorers seem to go for gloves under mittens when outside.
You may need something to fly in depending on how warm you expect the cockpit to be.
I used to wear double-layer silk inners under soft leather flying gloves which were fine for walk-rounds and flying down to about zero (not tested below) much but are not waterproof.
The difficulty will come if you have a mix of water and ice because you will often sacrifice dexterity and warm for waterproofness. So whether it will be a dry snow or just a cold wet environment makes a big difference.
I have known people in cold wet environments being fairly happy with sealskinz gloves.