Installation on OS X

vim-gocode extensively use the command readlink to detect Go packages. On OS X, you will have to install the coreutils :

$ brew install coreutils

And then add readlink to your path by adding the following to your bashrc:

PATH="/usr/local/opt/coreutils/libexec/gnubin:$PATH"

If you have any other problem to install vim-gocode post an issue there.