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I'm sorry, I'm not sure if I understood your concern correctly. Would you like to display the submission dates in your account in UTC? If so, you can change your timezone by navigating to your Account->Settings page.
Here's a screenshot where to find it:
If I am not mistaken, UTC and GMT actually shares the same time. However, UTC is not a timezone, you can check this link to learn more about it: http://www.timeanddate.com/time/gmt-utc-time.html
I hope that helps.