Aloha again gang anyone know how how to do his? This an uhf radio and trying to get it go work on Grms.

I have a set that cannot “talk to each other”. It seems it needs the cps.

Try using a freq at or below 462.7250.

What is the difference between FRS and GMRS radios?

Referred to as "UHF Citizens Band", FRS stands for Family Radio Service.

After May 18, 2017, FRS radios are limited to 2 Watts on channel 1-7 and channels 15–22.
All 22 channels are shared with the GMRS radios.

FRS radios come with fixed antennas, and cannot be legally modified to accommodate antennas
or amplifiers. Different from GMRS, you don't need a license to operate FRS radios.

https://www.radioddity.com/blogs/all/everything-you-want-to-know-about-gmrs-radio

Known as “Class A Citizens Band" while renamed by FCC in 1987, GMRS stands for
General Mobile Radio Service, using the same frequency band as FRS's (462-467 MHz).

The difference is that GMRS radios have designated channels within those frequencies
that aren't available to FRS radios. Its use is covered by FCC Part 95, but requires
a license to operate. According to the latest FCC rules, a personal GMRS license costs $35
(The new $35 GMRS and Amateur license application fees go into effect April 19, 2022!）
and can be obtained online at https://www.fcc.gov/wireless/universal-licensing-system

So, when you say you want a UHF radio to use GMRS, it already does operate within the same shared frequencies 1-22, but you can't access GRMS channels above that.

FRS radios are limited to 2 Watts on channel 1-7 and channels 15–22.  Channels 8-14 are also available for both types, but are limited to 0,5W transmission power.

The big differences are:
1. GRMS can transmit with up to 50 watts on channels 15-22 and above; and
2. GRMS has channels above FRS/GRMS Channel #22.

Even if your FRS/UHF equipment can transmit over 2 watts on 15-22, you still require a GMRS license.