I'm using tig along side git command line everyday. As such I think it should be mentioned on the GUIs list.
https://git-scm.com/downloads/guis?os=linux
But I'm having doubts now, since it does not do commits or other commands. It's a handy visual interface to git history, commits and other parts. But commands are stil made in the terminal with git.
Does it fit on the list? If yes, I'll make a PR.