I hope that you have a license for these radios. You stated GMRS radios which require a license.

Before any station transmits on any channel authorized in the GMRS from any point within or over the territorial limits of any area where the FCC regulates radio services, the responsible party must obtain a license. The FCC usually grants GMRS system licenses for a five-year term. To apply for a GMRS system license, you may file online through the Universal Licensing System (ULS), or file FCC Form 605 manually. New filers can learn more about ULS in its getting started tutorials. See Fee Requirements for FCC Form 605 (pdf) for current licensing fee information.

FRS radios do not require a license. If you have more than 8 channels you are required to have a license as that would be a GMRS radio.

When you take a radio into a foreign country they will ask to see your license. I have done this on several occasions and when I show the license, a supervisor looks at it and I am on my way. Some radios are not legal at all in some countries. In Japan they will look at your license.