Think about it. It makes perfect sense for the Gungans to mount an offensive against the humans of Naboo at this point. They have their entire army assembled and ready to march. The Naboo are weakened and shell-shocked by the Trade Federation occupation. And, boy oh boy, they are completely not expecting it.
And what have the humans ever done for the Gungans anyway? Invaded their home planet and forced them to live in secrecy? Brought powerful enemies with them who then also attempt to invade the Gungan homeworld?
When you really consider it carefully, the question is why would the Gungans not attack the Naboo at this point? Especially when they would make such a good food source. The only possible answer is that they're too easily distracted...
GM: The droids inexplicably shut down.
Jar Jar: Wesa won! Wesa won!
Captain Tarpals: Mesa so relieved. Mesa family safe now...
Jar Jar: What yousa mean?
Captain Tarpals: Mesa so ashamed. Da Trade Federation was threatening mesa family. Theysa made mesa tell them our plans.
Jar Jar: Yousa put us all in big danger. Yousa deserves to be pune-ished.
R2-D2: This ought to be good.
Captain Tarpals: Have mercy, General Jar Jar!
Jar Jar: Yousa no gets to eat da humans when wesa take over Naboo for da Gungans!
Jar Jar: Wesa army right here. Wesa attack da city while deysa weak and not expecting it!
R2-D2: Even better than I'd hoped.
Obi-Wan: You're not going to let her do this, are you?
GM: Why not? I encourage creativity in my players.
Obi-Wan: I... think the dinosaur ponies are tired from the fighting. They need to be fed.
Jar Jar: Theysa eats humans too!
Obi-Wan: And have their manes groomed.
Jar Jar: Oooh.