One other thing I should make clear; the AnyTone AT778UV / Retevis RT95 and the Baofeng radios are all "Amateur" radios that can work in the GMRS/FRS frequencies. They are NOT, however, officially sanctioned GMRS radios. Because of this, you are not "technically" allowed to operate them on the GMRS frequencies with the standard GMRS license.No, the AnyTone AT778UV is a full GMRS send/receive radio. Getting mine from Wally World (Walmart.com) for about $5 more than Amazon...well worth it to not support a company who thinks that their opinion on politics is more important than Americans' right to free speech...oops, better stop.
I should mention that this is the same unit as the Retevis RT95. There are lots of videos on these on the tube of U.
That said, they are all capable of working within the legal power limits of the higher powered GMRS channels. In reality, only GMRS certified radios bother to even do the .5 watt channels from 8 to 14, but then, no one uses those channels anyway because of their power limitations.
Will you get caught using one of these radios on the GMRS channels?, almost certainly not. If you have the GMRS license, will anyone care (as long as you stay within the power output and bandwidth limitations of the channel you are using), very, very unlikely. Are you breaking the rules?, yep.
If you want to be 100% rule-abiding and want to get more than 8 watts, you could look at something like the Midland MXT115 or MXT275 MicroMobile 15 watt radios or the MXT400 40 watt unit. For handhelds, there are lots of "official GMRS" units but few of them even specify their TX power, with most just giving some complete BS "miles" rating that don't mean squat.