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You need to leave the baud rate at its default of 115200 and make sure yo hold down the PWR button during the entire sequence. You will find much more information in the following thread: https://www.edaboard.com/threads/182804/
I would use an FPGA-based SOC with UARTS built in the FPGA fabric. That way you can have as many UARTS as you need. My suggestion is the Microsemi SmartFusion AFS050. Dev tools are free and design should be straightforward. The micro is a Cortex-M3 @ 100MHz
All GPS receivers transmit their data using the NMEA message protocol which, from the processor view, is a standard modem interface 48Kbps, 8 bits, no parity, 1 stop bit. Some newer GPS devices (such a Origin) also output data on SPI and/or I2C but still retain the standard UART...