Bay Area listeners who tuned into KGO 810 AM for decades will have to gear up for programming changes. Late last week, the station said goodbye in a statement on its website and over Twitter. KGO is owned by the broadcast company Cumulus Media. For 80 years, KGO produced news talk shows that gained a loyal audience across the Bay. One of the people who helped make that happen is Nikki Medoro. She became the first woman to host a morning drive talk show on KGO.