If you didn’t already know what a guncle is, the character of Patrick in Steven Rowley’s “The Guncle” is here to help. As the Palm Springs dwelling, mimosa loving, sitcom celebrity gay uncle to Maisie and Grant, Patrick opens his heart and his home to the kids in a time of crisis. Olivia talks with the author of “Lily and the Octopus” and “The Editor” about this heartfelt and humorous novel of grief, growth, and finding the people you need right at the right time.