As long as you can get new drivers for the card on that OS, which for Win 10 32 bit and the GT 1030 you can, then you should be fine.
If I was still using a 32 bit OS I'd make moving to a 64 bit OS the first priority. Unless the computer is old enough and slow enough that there's no benefit to using a 64 bit OS...but if that's the case I wouldn't be buying a GT 1030 for it. Unless you were going to use it as an HTPC or something like that.