I'd argue it's better than Boo and better than Blueprints. Maybe even JavaScript, because JS has made itself very useful as time has passed but as a small scripting language embedded in browsers it sucked.
It's only benefits are native integration with the client, and guaranteed support in perpetuity, and it's easy to write, and easy to learn, and teach, it almost never surprises you in ugly ways (which is awesome), it comes with a good enough debugger, its library pretty much covers what you need to make your average indie game... But what did the romans... I mean, GDScript, ever do for us?