Got invited to a birthday dinner by someone I didn’t like but people I like are going. Do I need to bring a gift/should I go?

I’m in a group chat with couple of acquaintances and friends I met in Uni. The birthday girl hosted a birthday dinner and 50% said yes. She then suggested 3 expensive restaurants and people chose the middle priced one of the expensive list. The rest of the people slowly accepted to go (including people who didn’t respond prior).

I ended up saying I’ll go because I saw the number of attendance went up and my friends said they’re going.

The problem is, I have a bad history with the birthday girl where she wasn’t kind to most people, talks shit behind people’s back, and often starts drama (by asking everyone who’s their least favorite person in class and apparently I was in her list.)

I can go to the restaurant and I feel like she’s expecting us to pay for her like a split check (she was always stingy with money). I don’t mind doing split check with everyone.

Will I look like a bad person for showing up but not have a gift?

Edit: to clarify, we already graduated

Yesterday she DM me “I miss you ❤️” when she never messages me ever. Her birthday is this Friday.

I think it’s my fault for saying I’ll go already. I just don’t know if I should bring a gift or what to do in this situation