Which radio service two letter code for GMRS FCC license?

[Ken S]

I'm trying to get legal with the FCC and they are asking for a two letter code? There is a huge list, which would it be for GMRS radios?

 

[DaveInFresno]

Look at bottom of list, you should see "GMRS", I want to say its "GZ"

 

[GrubWorm]

It's "ZA"