In Writer of LibreOffice on Mavericks os x 10.9, how to set gmail as default.

OS X 10.9 does not have a system mail default option. I want to use the email option in Writer to send files by gmail instead of having to export, then attach from within the gmail web page. Is there a way? I do not use the apple mail program which opens whenever I try to use the feature in LibreO. Changing settings in browsers does not help.