How to use UART3 of Ublox C027

Hello,
I am trying to get GPS data on Ublox C027 and successful in that. I want to get the GPS data on UART3 i.e. on pin D0, D1<P4_28, P4_29> . Can you please suggest me how to transmit and receive data on UART3.

Thanks in advance,
Payal