Gallery aligned left..

Hi

I am really liking your SIteBuilder application and Vantage theme a lot! I have only been using WordPress for a couple of weeks and have made great leaps and bounds with the forum and Support pages here.

One question, my site is www.michaelmaczesty.com and on the second page, “creative” I have used a couple different gallery plugins and they all default to the left. I would like to have them centered aligned. I am using the SiteOrigin Text Widget because I was not sure a better way to enter that short code into SiteBuilder.

Is there something that I can do to center align the gallery?

URL: http://www.michaelmaczesty.com/?page_id=10