Well, just to add some information I'm not sure you might know about, but to release games on PS4 and XBOX ONE, you would need their respective Consoles SDK's. Currently Godot doesn't have a game exporter to release games on those platforms, so you would have to code one up from the ground up.
But yeah, all the games you create using Godot are your own, according to the MIT License Godot is under.