The World Builder currently officially supports Linux, OSX, and Windows operating systems. Each change to the library is tested against these platforms. The only requirements are a C++ compiler (tested both with GCC and clang) with at minimum C++14 installed together with CMake (https://cmake.org).
What is in the Geodynamic World Builder package? will go in depth about what is in the Geodynamic World Builder package when it is downloaded and installed completely. If you want to skip this explanation, go directly to Installing the prerequisites.