Well I had some troubles getting googlecard widget for WordPress to work right.

My fix:

  1. Change the url to https in googleCardClass.php
  2. About line 113, added a line to make it not verify the ssl certificate when pulling with curl.
curl_setopt($this->curl, CURLOPT_SSL_VERIFYPEER, false)
  1. Change googleCards.css since it seemed to not like my theme..Changed:
    #plus_card { height: 90px; }
    #plus_card_name { font-size: 10px; }

Works for me!