Adding Google Plus Sidebar to Octopress found https://bandj.us/jo/blog/

_config.yml

# Google Plus Profile
# Hidden: No visible button, just add author information to search results
googleplus_user: 112735778092864419421
googleplus_hidden: yes
googleplus_profile_display: block
googleplus_post_display: block
googleplus_post_amount: 10

# Google Api Console
google_api_key: AIzaSyCqR5_JXEJlRpJJmjLwiRxNR2M5xyxEOBI

default_asides: [asides/recent_posts.html, asides/github.html, asides/twitter.html, asides/delicious.html, asides/pinboard.html, asides/googleplus.html, custom/asides/plusposts.html]

plusposts.html

<!--
JSON-P Google Plus fetcher for Octopress
(c) Jolam Jiang // MIT License
save it in custom/asides/
You can see the tutorial of adding sidebar here:
http://bandj.us/jo/blog/blog/2011/12/03/adding-google-plus-sidebar-to-octopress/
-->
{% if site.googleplus_user %}
<section>
  <!-- load jquery -->
  <script type="text/javascript" src="https://www.google.com/jsapi?key={{ site.google_api_key }}"></script>
  <script type="text/javascript">
    google.load("jquery", "1.7.1");
  </script>
  <!-- load jquery end -->
  <script type="text/javascript">

    $.noConflict();
    jQuery(document).ready(function(){
      plusLoadingStart();
    });
    jQuery.noConflict();

    function plusLoadingStart() {
      jQuery("#gplus_sidebar").css("display", "none");
      getJSON();
    }

    function getJSON() {
        jQuery.getJSON('https://www.googleapis.com/plus/v1/people/{{ site.googleplus_user }}?fields=aboutMe%2CdisplayName%2Cimage&pp=1&key={{ site.google_api_key }}&callback=?', function(resp){
          updateProfile(resp);
        });
        jQuery.getJSON('https://www.googleapis.com/plus/v1/people/{{ site.googleplus_user }}/activities/public?alt=json&maxResults={{ site.googleplus_post_amount }}&fields=items&pp=1&key={{ site.google_api_key }}&callback=?', function(resp){
          updatePosts(resp);
        });
      jQuery("#gplus_sidebar").css("display","block");
    }

    function updateProfile(resp) {
      jQuery('#gplus_sidebar_profile_displayName').html(resp.displayName);
      jQuery('#gplus_sidebar_profile_aboutMe').html(resp.aboutMe);
      jQuery('#gplus_sidebar_profile_img').attr("src", resp.image.url);
    }

    function updatePosts(resp) {
      var content = '';
      for(var i = 0; i < resp.items.length; i++) {
        var item = resp.items[i];
        attachments = item.object.attachments;
        content += appendLi(item.title, item.url, item.published, attachments);
      }
      jQuery('#gplus_sidebar_posts_ul').html(content);
    }

    function appendLi(title, url, time, attachments) {
      if(title.length > 130) {
        title = title.substring(0, 130);
      }
      var reg = /[\r\n][\r\n]/g;
      title = title.replace(reg, "");
      reg = /[\r\n]/g;
      if(attachments == null) {
        return '<li><p><a href="' + url + '">' + title + '</a> </p><p class="time_and_attachment">' + time.substring(0, 10) + '</p></li>';
      } else {
        attach_url = attachments[0].url;
        attach_url = attach_url.replace(reg, "");
        return '<li><p><a href="' + url + '">' + title + '</a></p><p class="time_and_attachment">' + time.substring(0, 10) + '<span class="attachment_span"><a href="' + attach_url + '">[attachment]</a></span></p></li>';
      }
    }

  </script>
  <style>
    #gplus_sidebar_profile {
      display: {{ site.googleplus_profile_display }};
    }
    #gplus_sidebar_posts a:link, #gplus_sidebar_posts a:visited  {
      display: {{ site.googleplus_post_display }};
      text-decoration: none;
    }
    #gplus_sidebar_profile_img {
      margin-top: .6em !important;
    }
    #gplus_sidebar_profile p {
      margin-bottom: .1em !important;
    }
    #gplus_sidebar_posts p {
      margin-bottom: .2em !important; 
    }
    #gplus_sidebar_posts .attachment_span {
      float : right;
    }
    #gplus_sidebar_posts .time_and_attachment {
      margin-top: .5em !important;
      font-size: 60%;
    }
  </style>
  <div id="gplus_sidebar_profile">
    <h1>G+ Profile</h1>
    <img id="gplus_sidebar_profile_img" src="http://www.gravatar.com/avatar/{{ site.googleplus_user }}?d=mm" />
    <a href="https://plus.google.com/{{ site.googleplus_user }}/posts/"><p id="gplus_sidebar_profile_displayName">loading...</p></a>
    <p id="gplus_sidebar_profile_aboutMe">loading...</p>
  </div>
  <div id="gplus_sidebar_posts">
    <h1>Recent G+ Posts</h1>
    <ul id="gplus_sidebar_posts_ul" class="recent_posts">
    </ul>
  </div>
</section>
{% endif %}