There are companies out there who specialise in this sort of thing, but unless the ai has up to the minute inputs of news (like the top striker in a football team got injured the day before the match) then it'd not going to be especially effective. It is only as useful as the data it's been fed. Otherwise you might as well just gather statistics and come to more up to date conclusions based on relevant data.
According to what I have seen of Chat, GPT cannot predict events, its programming indicates it, however the company that is developing it is creating a new version, I imagine that it is improved and that it has more options, what intrigues me is if You can make predictions, if this is the case it would cause people to go crazy, because games of chance and sports will be something that will give them a lot of use, for the good of many things, I think that you will not be able to make predictions, but in the same way everything is a beta version, if they are working on this new update I think they will be able to do it until 2022, since it has information until 2021.