Yes! Take it slow! Go easy on yourself.
I was on 1200/day, I think, a few years ago for horrific nerve pain resulting from an infection in my toe which was allowed to go on too long because that toe is numb from nerve damage in my back.
I, too wanted to be done with the gabapentin which at least worked for me but I was gaining weight.
I tapered it myself, 100 mg at a time allowing at least a week for each step down. 4 days after each drop I felt very angry for a day or so. Then it passed and was easier to tolerate after learning to expect it. I had to go back up quite a few times on the way down, but don't give up!
Just keep at it and you'll get there.
Maybe you can get some 50 mg capsules if they exist. And maybe something else temporarily for the anxiety if you can't taper slowly enough.
Write down the dosage, date, and effects so you can manage the taper and go back up a little if needed.
Fast forward to now, I am again tapering from 400 prescribed for nerve pain and trouble sleeping from anxiety. Going slowly, 100 mg at a time, down to 200. I am now on a tiny dose- of Buspar which is working well. So far not much trouble with nerve pain which I now have intermittently all over my body.
400 mg of gabapentin was leaving me barely able to wake up, really dopey. I super dislike that and again have gained weight.
Best of luck getting off of it! It can be done! Your doctor might be helpful, too. (I struggled like crazy to get off sertraline, succeeded, and would NEVER take another SSRI. Buspar is an SNRI which is reported to be relatively easy to discontinue.)
You can do it!