does anyone know if the greenish factory tint on my 01 gs430 is built in the glass or a film the factory put on?

To the best of my knowledge it's not a film, it's the glass that is tinted that color. Just in case you didn't know, there is also some kind of coating that makes the front windows water repellent, that's from 01-05.

thanks for some feedback. does anyone else have any ideas?