GMRS antenna

I'm currently using a Wouxun KG-1000G plus and a Wouxun ANO-050G NMO mount antenna. The antenna is tuned for GMRS frequencies 462-467 mhz. I would like to monitor local fire/EMS and skywarn frequencies in the 108-179 mhz range. Do I need an antenna that is tuned for dual frequency, similar to a HAM antenna?