Emm, im not sure of anything in particular, but I do know that rory and lorelai always always have movie nights together, where they get takeaway food and pretty much eat junk. Im sure that might not be the best idea for a bridal shower, I think those are usually during the day right? Im not sure, but you could incorporate that somewhere.

Another thing from the show was that they had crazy themed parties, like rory went to a college party that had the theme of the year 2002. That was really original and funny, and her friends all wore uggs and brought cheesy music from that year. If your friend is a big fan im sure she would find this funny and it would be something really different. I suppose it depends on her personality, for example, if she is quite sensible and sophisticated then these ideas may not work, where as if she is quite laid back im sure she would love them.

There are so many different parties and events in the series which you could take inspiration from, because it's set in a small close knit town (Star's hollow) and they often host events for the whole town. For example they once had a huge knitting event to raise money, where everyone had to knit for hours, and there was huge yarn balls, and sookie (lorelai's best friend) tried to come up with knitting themed foods.

Another thing from the show is an episode, rory and lorelai spend an evening with a geisha style japan theme. They both dressed up as geishas and they ate sushi and watched japanese movies.

Im not sure if any of these idea will help you, but its just to give you some idea of the things that feature on the show. If you watch a few episodes on youtube or whatever, there is bound to be some parties or events you could try to imitate.

If you need any more help about characters or costumes or foods or anything just message me :)

I just realised this answer is sooo long lol
xx