The Kim Gatlin novel on which this TV series is based is titled not "GCB" but "Good Christian Bitches." That title was also originally given to this show's pilot, but was then changed to "Good Christian Belles" before promotion of the show started, but then changed again to just the ambiguous abbreviation "GCB".
Jennifer Aspen wears a fat suit throughout the series for her character (Sharon Peacham) to appear overweight.
Was canceled after ten episodes.
David James Elliott (Ripp Cockburn) and Grant Bowler (Mason Massey) both played the character of Wolfgang West - Bowler in the original NZ Outrageous Fortune (2005), and Elliott in the short-lived U.S. adaptation of Scoundrels (2010).
Miriam Shor (Cricket Caruth-Reilly) went on to work with Darren Star again on Younger (2015), where she played Diana Trout.