Hello Panama, what Galaxy is it?
Most of the 4 pins are all the same. look here:
http://cbtricks.com/radios/galaxy/dx99v/index.htm
This is a 99, scroll down to the bottom of the page, and you will see the pin out for the radio.
How many wires in the mic cord?
And what colors?
Your little "mud duck" is right here...LOL
Most Mics, the Audio is white, and has the shield wrapped around it. You will have a RX wire, a TX wire, Audio and Shield, and a Common. Sometimes the shield is common.
A common mic, like the old cobras were:
red =tx
black = rx
audio = white
shield = common
Let me know how many wires in the mic cord.
Maybe someone here has the same mic, and can chime in.
73
Jeff