If only improvement were simple
For most players, reaching GM means focusing solely on chess and excluding nearly everything else in life.
This means dropping out of school and/or quitting your job to focus on chess study and training full-time. This also means abandoning any other hobbies or pursuits.
It means investing a lot of your (or your family's) finances in private coaching, tournament fees, and travel expenses. It also means the pursuit of a title that'll likely take around 5 to 10 years of your life to reach.
If this doesn't sound like the kind of life you can and/or want to lead, then a GM title likely isn't for you.
@IfPatriotGames that probability is somewhat wrong, because you are taking into account people that dont play chess. The probability should only consider people thst plays chess. I guess the question would be "if I play chess, whats the probability that I'll become a GM?". And my answer would be
This is ten percent luck
Twenty percent skill
Fifteen percent concentrated power of will
Five percent pleasure
Fifty percent pain
And a hundred percent reason to remember the name.
Yes, I was taking into account everyone on earth. That's because pretty much anyone can learn how to pay chess, so I counted those people. There are more people now, but probably more grandmasters too. So the odds are probably still about 5 million to one.
We could consider only people who play chess, but still, anyone could do that. But lets say it's only people who play some chess. That's about 600 million people, so the odds get better. Or, only people who have a rating over 1000. Odds get better still. Or if only consider people with ratings above 2200, the odds get even better. And for people who are rated over 2400, and have extensive tournament experience the odds start to get pretty good.
So to answer the question, yes, there is a chance. First learn to play chess, then second, improve. It's only two simple steps to become a grandmaster.