Recently I got some new Walkie-Talkies, which are capable of using FRS and GMRS frequencies and I am a complete amateur when it comes to this. In the manual it said that in the GMRS frequencies there is a NOAA weather channel, but it also states that you need a license for GMRS frequencies however it does not state if you need a license to either transmit or listen, or both. I only intend to listen, would I need a license for this?
I beg to differ with the others.
Up until a few years back, there were two radio services:
FRS = 1/2 watt, non removable antenna, 14 channels.
GMRS = 5 or 50 watts depending on the channel, 8 repeater input channels, 8 repeater output/simplex channels, 7 interstitials shared with FRS.
A few years ago, the FCC changed up the rules.
FRS became the 14 original channels, plus the 8 GMRS simplex channels but it had to be under 2 watts and still non-removable antennas.
If your radio falls under 2 watts, has a non-removable antenna, and meets all the requirements (FCC type certification) for the new FRS rules, then no FCC license needs to be applied for. You have to follow the FRS rules, in what is called "License by Rule".
If your radio puts out MORE than 2 watts and/or has a removable antenna, and/or allows access to the GMRS repeater inputs, etc. Then you DO need to apply and receive your valid GMRS license.
I'll add that the consumer level GMRS/FRS radios are pretty lacking in capability. The big benefit to getting your GMRS license is the ability to use better radios, external antennas, etc.
The best place to get info on FRS and GMRS is:
Electronic Code of Federal Regulations (eCFR)
Straight from the horses mouth. Understanding it all, however, is a whole different challenge.