Prevent gvim from clearing the clipboard on exit [duplicate]

Question

If I copy text into the xterm clipboard ("+y) from gvim, it is cleared when I exit gvim.
How do I prevent this?

I've found the solution for vim, but it doesn't work for Gvim:

autocmd VimLeave * call system("echo -n $'" . escape(getreg(), "'") . "' | xsel -ib")

https://superuser.com/questions/299419/prevent-vim-from-clearing-the-clipboard-on-exit