The binaries for GSL 1.12 are provided in this post: MinGW (3.4.5) binaries of GNU Scientific Library 1.12 for use with MinGW and Visual C++
“The GNU Scientific Library (GSL) is a numerical library for C and C++ programmers. The library provides a wide range of mathematical routines such as random number generators, special functions and least-squares fitting. There are over 1000 functions in total with an extensive test suite”.
GSL is quite Unix centric but one might want to use the library at least with MinGW on Windows. I didn’t find any MinGW binaries of GSL apart from the one provided by the Ascend package or the binaries from GNUWin32 (which is only at version 1.8), but I don’t like graphical installers for libraries and I needed the static library. Therefore I compiled my own library with MSYS (I updated MSYS according to this link) and provide here the tarred binary package, which can also be used with the MinGW compiler without MSYS and with Visual C (import libraries for the shared library are provided).