Yes, there may not be many precedents but yes it is
I recommend changing your approach though. Don't set grandmaster as your goal. Start by trying to become a decent player. Once you're decent, try break 2000. When you're at 2000, move on to the next goal and so on.
But what do I know, I'm only a lowly 1500 player with less than a years experience
Is it possible for someone to start playing chess at a later stage in their life say for example 50 years old and still make it to Grand Master level?