GSL shell offers an interactive command-line interface that gives access to the GSL collection of mathematical functions. It is based on the powerful and elegant scripting language Lua. GSL shell is not just a wrapper over the C API of GSL, but offers a much more simple and expressive way to use GSL. The objective is to give the user the power to easily access GSL functions without having to write a complete C application. It also has a powerful module to produce plots or almost any kind of graphics based on data or functions. Release Notes: This the first stable release of the 2.0 branch. Many build problems have been fixed for Linux and Mac OS X. Many fixes have been done for the x64 platforms, and a couple of serious bugs with LuaJIT2 have been fixed for the ARM platforms. Thanks to LuaJIT2, GSL Shell now works on x86, x64, and ARM with full JIT support. Support for compiling on Mac OS X was added.