It were a joke about Gilbert & Sullivan, Sullivan Canyon, & Gulliver's Travels. A bad joke.
I know who Gilligan is!
Not
"bad", just
FAR reaching, AT...
More like a fine example of pure, clever, linguistic free-association ! (pointless, though)
You know Gilligan? I'm impressed !

It's even more impressive that you know who Gilbert, Sullivan, and Gulliver are, though...
...hey, didn't they compose the score for the 3-part Broadway musical,
Captain Lemuel Gulliver, MD. ??