I have a gravity form on the homepage of http://strategicplan.library.ubc.ca/. As you can see the reCaptcha is not working. I'm not sure why. I'm using Gravity Form 126.96.36.199.
This is probably a theme or plugin conflict. I see your theme is loading at least 13 different .js files.. there may be a conflict with one of those and the script that loads the reCaptcha field. Try testing for a conflict and see what you can find out. Details on how to do this are linked below.