LORELAI: Well, uh, gee, Mom, I don’t know, let me see. Black ice, treacherous roads . . . I guess I’ll just put on my red, white, and blue leotard, grab my golden lasso and fly the invisible plane on over.
Lorelai is referring to the character of Wonder Woman, a DC Comics superhero who is a goddess and princess of the all-female Amazon warrior people. Named Princess Diana, her civilian name when blending in with everyday humans is Diana Prince.
Wonder Woman wears a red, white, and blue costume, and has a magic golden Lasso of Truth, which forces people into submission, and makes them tell the truth. Her mode of transport is the Invisible Plane that can travel at 2000 miles per hour.
Wonder Woman first appeared in All Star Comics #8 in 1941. However, Lorelai probably remembers the character best from the Wonder Woman television show, which ran from 1975 to 1979 (when Lorelai was aged seven to eleven); for the second season the title became The New Adventures of Wonder Woman. The title role was played by Lynda Carter.
I can imagine the young Lorelai enjoying a story based on a strong, beautiful woman with superhuman powers. The show was still on TV in re-runs during the 1990s and early 2000s, so she might have watched it even as an adult.