The 46-year-old met Nunes during the travels she chronicled in her 2006 memoir. Eat, Pray, Love sold more than 10 million copies and was made into a movie which starred Hollywood A-lister Julia Roberts as Gilbert.
'He has been my dear companion for over 12 years, and they have been wonderful years. Our split is very amicable. Our reasons are very personal," Gilbert added in the post, “At this time of transition, I hope you will respect our privacy. In my heart, I know that you will do so, because I trust that you understand how this is a story that I am living — not a story that I am telling.'