Rory tells Esperanza that she only speaks a little Spanish. Alexis Bledel's first language was Spanish, and she's still quite fluent.
Lorelai says she can build a recording studio in her house and rent it to Korn. Korn used to rent Trix's house in Connecticut.
The name of Emily's maid from Romania is "Draguta" which means "Sweet" - which doesn't fit her at all.
When Rory was was watching tv of a scuba diver standing at the bottom of a pool, it's Dustin Hoffman in the movie The Graduate
The lavender blossoms hanging down from the Gilmore home's porch are wisteria. In real life, wisteria vines only bloom once a year (usually in late March or early April), and the flowers only live for 3 to 8 weeks, on average. (The city of Sierra Madre, California (just 17 miles east of Warner Bros. studio, where "Gilmore Girls" is filmed), holds an annual festival each March to celebrate the brief annual bloom of a local wisteria vine, which holds the record as the largest blossoming plant in the world.)