I
am Not sure why so many started thinking GMRS or
UHF was good to bounce around buildings or other objects..
Basically...
UHF frequency's ( which include GMRS ) are Strictly LINE of SIGHT.
It also works well for ham radio for doing satellite contacts..
From a stand point of whether GMRS ( without repeaters) or MURS will enable further contacts...
Well can go a couple of different ways..
You have many more channels you have to use in GMRS ( not counting FRS) and so one might think that makes GMRS better..
However because MURS is within VHF frequency's you are likely to get further distance talking on MURS...
Both with and without the various types of skip..
But there are less channels within MURS..
GMRS is far more likely to have activity though given how many and how easily available GMRS radios are..
If your looking for regular contacts with a particular person then it is likely MURS that is better suited ( because of how VHF typically travels further both with and without various skip conditions )
If you are able or willing to consider repeaters..Then the pendulum swings back to GMRS..
Regardless which you find Best for you..
The important thing to remember is...
The BEST antenna you can get..
The HIGHEST you can mount it..
By me there is not a lot going on on MURS ( there is actually police using one of the MURS channels) but regular joe people by me rarely use MURS..
GMRS though has a crazy amount of people on it ( including many repeaters too ).
Guess it all depends on what your looking for as well as which is used more by you..