Honestly wondered is this was a troll :)
Gamepress lives thanks to ads, so don't count on a command line version of their tools, which would promote usage of them without loading web pages and their ads.
Though all hope is not lost: I suggest you check out the URLs every time you use GoBattleSim. It's not completely obscure and that way you can write your code to create customized URLs which you can then pass on to your web browser for rendering. I have no idea for getting the outputs though.