GMRS, are you talking about those radios you can get at Walmart? Since when do they need a license?
You might be referring to FRS. Same channels, less power, and no repeater privileges. GMRS you're allowed 50 watts and repeater access, but it requires a 50 dollar license from the FCC that's good for 10 years. I got mine so as to be able to talk to family members who won't get an amateur license. Which I can't blame them for that, they don't see the value in it and it's not exactly easy. Well, it's easy, but far from convenient.