^^^The actual gravel rally tires (NOT rally spec ice/snow specific tires), although they look like they are just not micro-siped winter tire, would suck WORSE THAN pure summer tires in the cold, let alone on any ice or snow, since the compounding is TOTALLY different, and the tread pattern will not bite into the snow/slush/ice at all.
IF you are just going for a 'look', it is not worth doing, since you will give up almost ALL handling on hard pavement, the turn-in will be as bad as a town car, and real gravel tires will last less miles on hot tarmac than even 00 tread wear full race slicks (IF driven hard on hot pavement, you will actually see the tread blocks flying off of the carcass in big chunks!).
All the while they will cost you $175-$250+ A tire, and deafen you with their screaming on the highway.
IF you are not going off road, on gravel/dirt, driving VERY FAST, they are a REALLY BAD idea.
Now if you are asking about competing in SCCA Rallycross (basically an autocross, around a coned course, on dirt/gravel/grass) and a setup for that, then YES, the wealthy/serious competitors use new gravel tires, put on and taken off AT the event, or if on a budget, used take-off gravel tires from a Pro/stage rally team (IF one can find these!), or just a harder, NON ice oriented (NO sponge soft 'micro-sipes') winter tire.