Is Jupiter GPL licensed


As of this date, Jupiter has not been released under GPL but it will be released under GPL in future (a couple of months or more).

The free version of the theme will be released in so that users can download and install it for free.
The point to remember is that under the GPL version, only the basic theme will be released which means no premium plugins like WPBakery, no extra features like Shop customizer.

For all the extra features, you will have to purchase the premium version of the theme from the ThemeForest