Hello @bugsplatterbeast and welcome to Mayo Clinic Connect. @jakedduck1 shared some helpful information on his experience with medication that can cause neuropathy.

This article may be helpful as you continue to try to pinpoint if Gabapentin may be involved in your neuropathy onset.

- What are the side effects of gabapentin?:
https://www.medicalnewstoday.com/articles/323753
Reference info: "tingling in the hands and feet - listed as a long term rare side effect that requires medical attention"

I wonder if seeking a second opinion would be helpful in your case?