Carol--Sorry, I was busy yesterday and didn't see your message. I'm afraid that ANY tea made from tea leaves, black or green, caff or decaff, will irritate a GERD problem. That was my experience. (Strictly herbal teas, like mint leaves, celestial seasonings-type, etc. shouldn't bother you at all.)
My experience was that after I got it completely healed I was able to go back to drinking green tea, which is what I do every morning now. BUT, I had to wait a long time (months) to get to that point. So if it were me, I would do EVERYTHING possible now to get it healed, i.e., eliminate tea and any other foods that might be bothering it, with the idea that later on it may well be possible to reintroduce these. Or, you may find that starting tea again causes problems in your case--I don't know, but you won't know for sure until you try it.
Yes, that ginger juice is high-octane! Whoof! I happened to have a hand-juicer due to a previous flirtation with wheatgrass juice, so I used that. Is there anybody you know who has a juicer you can borrow for just one batch of it? It keeps pretty well in the fridge, so you might only need to do it once. Another possibility--a couple years ago at Whole Foods I saw a bottle of pure ginger juice. (small, sort of like a hot-sauce bottle) I wondered if, although it's not fresh-squeezed, that might work too.