Vimからmilkodeのgmilkコマンドを使う(Unite版) ref: http://qiita.com/items/abe5df7c5b21160532b8

.vimrc

NeoBundle 'Shougo/unite.vim'
NeoBundle 'sgur/unite-qf'

file1.vim

:NeoBundleInstall

file2.vim

" gmilk コマンドの結果をUnite qf で表示する
command! -nargs=1 Gmilk call s:Gmilk("gmilk -a -n 200", <f-args>)

function! s:Gmilk(cmd, arg)
  silent execute "cgetexpr system(\"" . a:cmd . " ". a:arg . "\")"
  if len(getqflist()) == 0
    echohl WarningMsg
    echomsg "No match found."
    echohl None
  else
    execute "Unite -auto-preview qf"
    redraw!
  endif
endfunction

file3.vim

:Gmilk [検索語句]