Update GPU-Windows.md

docs/GPU-Windows.md

@@ -3,7 +3,7 @@ GPU Windows Compilation
 
 This guide is for the MinGW build. 
 
-For the MSVC (Visual Studio) build with GPU, please refer to https://github.com/Microsoft/LightGBM/wiki/Installation-Guide#windows-2 
+For the MSVC (Visual Studio) build with GPU, please refer to https://github.com/Microsoft/LightGBM/wiki/Installation-Guide#windows-2 ( We recommend you to use this since it is much easier).
 
 # Install LightGBM GPU version in Windows (CLI / R / Python), using MinGW/gcc