Gio's next location wound up being the base of sogyoku hill. He used to train there when he first got out of the academy. While he had trained plenty of places since then this one always stood out to him. It was where Sorareo-o first hinted at not being at full power. The spirit had with held its full name and limited its power, to the point where Gio couldnt even draw his sword from the sheath without releasing its shikai. Back then the zanpakuto's biggest ability had been helping Gio control his spiritual energy which provided him one of 2 edges in the art of Kido. But Gio learned to master his own energy on his own, fulfilling the swords requirement and being given its actual shikai name. He had to be able to draw the sword on his own by harmonizing perfectly with the blade. He wasnt able to do it untill after the Kido corps Tunnel bullshit that helped him focus. This place marked the beginning of his days as a real shinigami in his eyes. The kind of Shinigami that raises his sword for the sake of balance. The only next Logical step was bankai, Though while he worked on it achieving it presented its own difficulties. But he was convinced that Sorareo-O was just being extremely difficult on purpose while he thought up some ridiculous challenge for Gio to have to overcome to achieve bankai. after all subjugation is a vague process for a reason.