Gigi Stopper is the fiesty, opinionated, widowed Texas dame who enjoys a stiff drink as much as she loves church. Annie Potts, who portrays Gigi on the freshman ABC dramedy "Gcb," calls her "the hostess with the mostest ...belle of the ball ... Auntie Mame." Potts has been a steady presence on television for the past quarter century with regular series roles on "Love and War" (Emmy nod in 1994), "Dangerous Minds," "Any Day Now" (SAG bids in 1999 and 2000), and most famously "Designing Women." She co-starred…