Amber Laign

Robin Roberts just officially came out of the closet ... telling the world she's gay and has a longtime girlfriend. Robin just recounted her triumphs over the last year on her Facebook page ... talking about her battle with cancer and how she overcame the odds and regained her health. In the…

Robin Roberts -- who came out yesterday -- has been open about her sexuality for years ... she just didn't feel the need to go public until now. Sources close to Robin tell TMZ ... everyone in her life -- both personally and professionally -- knew she was gay and in a 10-year relationship with…