Haha GN means Group Number! They each performed their new programmes, and also a group number (not clear but likely choreographed by Kazuki himself.
I'm SO surprised Kazuki debuted his new free, and have so many questions... Did he go to Canada, was Lori in Japan, or did they do it virtually?

In any case, he described his new free as 'Kazuki Tomono's full size lunchbox' LMAO, as it contains all the characteristics of his skating. It makes me happy that he feels this programme is very 'him', despite the fact that it's the first time he works with Lori, and Lori is also working with so many Japanese skaters this season.
As for the SP, he performed part of it as an encore, and said it's very 'Shae'. He revealed that initially they had decided on a different song, but when they heard 'Tschegue' on the ice, they felt like 'this is it!' and changed last minute.
Apart from that, the event also featured a skating class, and some fans that arrived early got to see Kazuki practising. They said that Kazuki's jumps are looking even more beautiful, and he landed 3A, 4T, 4S and 4T3T with ease, although he didn't include all the jumps in the free.
Here's a short snippet of Kazuki's new free (that twizzle!), group number and some pictures, from Hiraike-sensei IG:
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One thing that got my attention is that the stands were full, which is particularly impressive considering that The Ice Aichi is also happening today. It really shows that it's not really rocket science: if you offer a high-quality event focusing on skating for an affordable price, people will come! I can't help but think that, in this sense, this event channelled the spirit of Kassouya, and in fact I also saw that some Dai fans also attended this event as a way of supporting the Kassouya boys, which made me very happy