GitX is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is SmartGit. It's not free, so if you're looking for a free alternative, you could try GitKraken or GitAhead. If that doesn't suit you, our users have ranked more than 25 alternatives to GitX and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to GitX are gitg (Free, Open Source), Sublime Merge (Freemium), git-cola (Free, Open Source) and Ungit (Free, Open Source).
SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS X and Linux. SmartGit is intended for developers who prefer a graphical user interface over a command line client, to be even more productive with Git.
Sublime Merge is a fast and intuitive git client built on the same performant platform as Sublime Text. FEATURES - integrated three-way merge tool, - side-by-side diffs - powerful search - syntax highlighting
Gitweb is a Git web interface. It is written in Perl and can be used as a CGI script, or as a mod_perl legacy script (run by ModPerl::Registry handler). It allows browsing a git repository (or a set of git repositories) using a web browser.