Hi Nathan!
Have a look at this link:
https://www.wikitree.com/wiki/Special:DownloadGedcom
You can either choose to download all profiles on your watchlist (the profiles that you manage, and profiles that you are on the trusted list of), or just the ancestors or descendants of one specific person, whose WikiTree ID you can enter. That person can also be yourself, if you want only your own ancestors, for example.