GitHub and Libgdx

i’m about to start my nea and need to use libgdx for my project but would like to be able to work on it at both school and home, i’m just wondering what files i do and don’t need to add to my repository.i currently have all the files i would have in a normal java upload (my idea and src) but will i need things like gradel ect. i. couldn’t find anything online and any forums related to git or libgdx i posted on wouldn’t help 🤷
any help would be really appreciated