Solange Knowles has a new man in her life! A source close to Knowles and her beau, Gio Escobar, confirms to ET that they are an item. «They have been dating for a while and are very happy together,» the source says. «They make for a very sweet couple.»Reps for Knowles did not respond to a request for comment on her new relationship.Escobar is a jazz composer and the founder of Standing on the Corner, a Brooklyn-based experimental jazz and hip-hop group.News Knowles' new love interest comes