ChatGPT can not access any real time info.
If you give it a verbal description of the situation then ask it to act like ATC and guid you to a landing, it will give much better results. Since it is not trained on proper phraseology, you can teach it temporarily in your chat. Tell it how to say things, and it will. If this kind of tech would be used in MSFS , the AI would have access to all hthe parameters in the sim, with chatgpt you will have to give it a scenario. Describe the current weather, your current position, the type of aircraft and its limitations, the airfiled ect ect. the more info you give it the more clever it will be. When I tested it I used LHBP, gave it weather info, gave it a description of the 4 ILS approches , then asked it to act as ATC and give me instructions. I corrected it until it was giving me good info with different weather 
I would love to just type or say my request to MSFS ATC. for example when i mess up my descend and just say give me and extended downwind, and it would replay properly
ATC is a much narrower set of language then what chatGPT is currently trained, so the possibility is absolutely there,