It will really depend on whether your GERD is weight/diet related or due to a other reasons, and you can take the WLI slowly, stick to the lower doses for longer and see what impact it is having on your GERD.
I was prescribed Omeprazole for 8 years before I started Mounjaro. I couldn't go a day without it without being very uncomfortable very quickly.
I stopped taking it last year after I'd lost around 3st, although I don't think it was only the weight loss, I think it was also the change in diet, coming completely off fizzy drinks, drinking more water and minimal sugar/UPF.
At that point the reflux became less regular and I started noticing more specific triggers - I now avoid tomato based foods, citrus, heavy meals, and also going too long without food. If I do that I am usually ok, otherwise if I am busy and perhaps skip breakfast a couple of rennies is usually enough to sort me out, or if I have a meal out an occasional dose of Gaviscon Advance helps.
So glad to be off the omeprazole as it was causing others issues for me.