The island is called Cato Island, and since a few months back I created a gay character named Cato, well... This had to be done. Irony at its finest???
Cato is from a Gravity Falls AU/Night Vale crossover, so yes it is an iteration of Bill Cipher he's speaking to because the Bill in his story would absolutely poof him to this island.
Here's a picture of the sign from the tumblr post. I can't link the post due to some inappropriate language, sadly.
![Image](https://68.media.tumblr.com/86403e4de3f0bfffbdcfce9ce46bc003/tumblr_inline_omx4ez7pid1sx5w2e_540.png)
But happy pride month, everyone! :3 Stay safe and have fun!