No. Most countries in Europe have adopted a different standard known as PMR ("Personal Mobile Radio"). While PMR radios are very similar to your GMRS radios, PMR radios use different frequencies. If you attempt to bring your GMRS radios into Europe, they might get confiscated in customs.
PMR radios are currently approved for use in the following countries: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Lithuania, The Netherlands, Poland, Portugal, Spain, Sweden, Switzerland, Turkey and the United Kingdom.