If you want healthy, then definitely get a US captive born and bred (USCBB) snake. "Farm bred"/"imported" are still wild caught.
Here's a link to read through about where the GTP's come from: https://www.tapatalk.com/groups/more...ms-t23611.html
They're really not an intense snake by any means, just not always handleable and kid-friendly like ball pythons are. They move rather slowly and deliberately still. Especially if you get a neonate, it's best to avoid handling unless necessary until they're around a year old, because their tails are very fragile.
The fb group called "Green Tree Pythons~ Buy, Trade, Chat" or something is the most active to ask questions and post.