it is used when we talk about the insured future
it is used the same with all pronouns
- I am going to see you tomorrow. ...
- He is going to visit her next week. ...
- They are going to eat out tonight. ...
- She is going to leave for Europe on Monday. ...
- She is going to wait me after the show. ...
- I am going to get up early tomorrow. ...
- It is going to rain today. ...
- You are going to study to be a lawyer.
we can use a contraction which is gonna
I’m gonna play the guitar on Saturday
She’s gonna buy a book tomorrow
exercises: https://english.lingolia.com/es/gramatica/tiempos-verbales/future-i-simple-going-to/ejercicios