This is an interesting vernacular form, which would normally be labeled a gabled-ell; in this example the main section, on the left, is a shotgun house, with another shotgun extension to the right.
Winged Shotgun House, Glenwood
Vanishing Georgia: Photographs by Brian Brown
Since 2008. A visual survey of Georgia's historic architecture and culture. 9,000 locations. 30,000 images.
Interesting. I saw a church like this once, in San Luis Obispo, California: It too had two wings, joined by the altar in the center. Don’t know why it was built that way. Never seen another one like it.