I've heard of ginger tea and other preparations of ginger for nausea; I don't know anything about stomach acid. I did see this online, though:
https://www.healthline.com/health/digestive-health/ginger-for-acid-reflux#:~:text=Ginger%20is%20rich%20in%20antioxidants%20and%20chemicals%20that,into%20your%20esophagus.%20Ginger%20can%20also%20reduce%20inflammation.
You can make a ginger 'tea' just by stirring a small amount of powdered ginger, like what you use for cooking, into water and heating or chilling it as you like. You can boil a piece of fresh ginger in water, too. Or let slices of fresh ginger sit in a jar of water in the fridge for a couple of days. There is a store near me that sells candied ginger, too. I have a neighbor who eats a very thin slice of fresh raw ginger every day. He says it helps settle his stomach.
Ginger doesn't have any caffeine in it, so the only reason a ginger tea would be caffeinated is if another ingredient in the tea had caffeine in it.

Hi Pinksky4u,
I'm sorry to hear about your Gerd and your problems with it. That's terrible! I drink Stash tea from Oregon. I just love it and have drank it for many years. My favorite is orange spice. They do have a lot of ginger tea blends. Their website is Stashtea.com. This tea is very natural. They have a lot of different varieties. I hope this helps.
PML

Treating your GERD is highly important. What’s causing it? Besides ginger which is good, dietary changes are critical. But again what is “causing” your GERD? That info is critical to treating it.
Best to you!

actually for me, ginger seems to make things worse, it's too...not sure what; but it seems to aggravate my tummy, too strong...

@pinksky4u These may help, you will just have to try for yourself. Two are decaf and one is not. I drink these all during the day. I am not really a coffee drinker. My Dad and Mom always drank tea, so not much coffee around our house growing up. Now with Gerd, I stick with my tea. Below are the three teas I drink most of the time.
Steep by Bigelow organic lemon ginger caffeine-free herbal tea
Yogi Stomach Ease supports healthy digestion through caffeine-free organic herbal supplement
Harney & Sons Hot Cinnamon spice black tea
I do not steep these as long as suggested. You will have to adjust to taste.
These work for me. I hope this helps you. Take care KLH

Try Throat Coat tea. Also from Amazon Gaviscon Advanced. Also trying bland diet to heal esophagus.
Good luck

Try Gin-gins or Chimes ginger chews through the day! It's got sugar tho, but helps in a pinch.

Steep by Bigelow is an organic lemon ginger caffeine-free herbal tea. I order from Amazon. Thanks for your reply. I hope it helps and you like it.

I buy Tazo Organic Green Ginger Tea and I have found it helps me.
But I use it more if my stomach is upset. I have GERD, my symptoms are a burning in the back of my throat, and top of my stomach upon waking. It goes away as soon as I get up. I’m now trying to find a medication that works.

Hi there - I found something helpful for that problem - a supplement made by "Life Extension" called Esophageal Guardian. You take the capsules after (or before? can't remember! The instructions are on the container). The contents form a protective layer overtop of the food contents of the stomach, and they can't back up and irritate either the stomach or the esophagus. I was surprised at how effective it was. The active ingredient is "Alginic Acid" - not sure how it works but you can look it up. By the way, although I found this very helpful, I have no interest in the company or the product - other than how much it helped! Good luck!!