Nope, reading the actual journal article they place Gansus basal to Carinatae and Neornithes, the clade of all modern birds. I don't know enough about bird skeletal structure to determine the differences, but they must be notable for it to be so far removed. It seems the key differences eliminating these from Carinitae and modern birds are the bony structures of the limbs.
"The five specimens described by Dodson and his colleagues had many of the anatomical traits of modern birds, including feathers, bone structure and webbed feet, although every specimen lacked a skull"
"must be notable" was not expressed in the article posted.