Not sure about status in Aug 2015 but you are probably correct that all Spectre and Spooky probably are all retired, to be replace by the new Ghostrider.
From wiki - In March 2011, the U.S. Air Force deployed two AC-130U gunships to take part in Operation Odyssey Dawn, the U.S. military intervention in Libya, which eventually came under NATO as Operation Unified Protector.