Erlang doesn't have priorities natively, does it? As far as I am aware, there is a standard pattern to do it, like this:

    receive
        {high_p, Message} ->
            process_high(Message)
    after 0 ->
            receive
                {high_p, Message} ->
                    process_high(Message);
                {low_p, Message} ->
                    process_low(Message)
            end
    end 

The Go equivalent can be done with different channels for priorities and similarly nested selects, as I am sure you are aware.