Applescript to send Gmail email to Omnifocus. Email subject will become the action title. A link to the email will be added to the action notes. If you've selected some text, it will be added to the notes as well.

Send Gmail email to Omnifocus.applescript

tell application "Google Chrome" to tell active tab of front window to set the URL to "
javascript: (function() {
    var enc = encodeURIComponent,
        w = window,
        frames = w.frames,
        d = document,
        ms = w.getSelection ? w.getSelection() : (d.getSelection) ? d.getSelection() : (d.selection ? d.selection.createRange().text : 0),
        mu = w.location.href,
        mt = d.title,
        subjSpans = d.getElementsByClassName('hP'),
        i, url;

        if (subjSpans) {
            mt = subjSpans[0].innerText
        } else {
            mt = d.title.substring(d.title.indexOf('-') + 1, d.title.lastIndexOf('-')).replace(/^ +/, '').replace(/ +$/, '')
    };
    an = mu + '\n\n' + ms;

    url = 'omnifocus:///add?note=' + enc(an) + '&name=' + enc(mt);
    w.location.href = url
})();
"