There’s Elpher if you’re on Emacs. It supports both gopher and gemini.

I prefer Amfora as a TUI client:

https://github.com/makeworld-the-better-one/amfora#amfora

But I'll give Diohsc a go!

I used amfora for quite a while before I found Lagrange and Diohsc. It is a very good client, also probably the easiest to use TUI client for starting out.

Diohsc takes a little getting used to, but once you start using marks and the queue, it becomes very pleasant.