Gift for the bride at a bachelorette?

I don't think you need to give her a gift. i think you guys paying for the bach party and her portion is plenty

I agree with this. Just cover the expenses of the party. Gifts are optional.

The party IS the gift (which is why brides shouldn't tell people to throw them a party; parties are expensive and time consuming to host). I would say thanks, but no thanks to that bridesmaid. She can bring a gift if she likes; she can even ask the other participants if they want to go in on it. But you are absolutely in the right to say you are sticking with what you already have planned.

Gifts aren’t needed at Bach.

I have never done a large group gift, but we have done small individual gifts before. Personally, I am not a fan of that. I agree with you, if you are already spending a lot of money for the bachelorette party, you shouldn't have to spend more money on a gift. You could always poll the other girls attending (privately) and see what they think?

I would tell the bridesmaid who suggested it to send a group text to everyone going and ask who is interested. At my bachelorette, a few of the girls brought me presents so they individually bought things and wouldn't want to pay for another group present. I didn't expect any presents at mine though. You could also do something sweet, like letters to the bride from everyone!