MacVim and gVim and Vim configuration

Remember that if you use gVim or MacVim the configuration file is different! GUIs for vim read the options in .gvimrc instead of .vimrc.
However most of the times it's enough to have a simple simlink from one to another, so just do

ln -s ~/.vimrc ~/.gvimrc

Note that just deleting .gvimrc won't be enough, as defaults will be loaded then.