Can anyone help me with Copernicus breakout board?

Please, any help would be appreciates.

I am hooking up a copernicus breakout board to my FPGA, I put power, ground, power to standby, and Trying to Read $GPGGA,hhmmss.ss,llll.lll,a,nnnnn.nnn,b,t,uu… from the TXA Pin. What do I have to do with RX-A, RX-B? Any help would be appreciated.