I have not seen all the previous posts an maybe someone has already
suggested the following (please accept my apology if this is a repeat of
someone's previous post).

I would use the onboard UART to receive NMEA string data from the GPS head
(you can set your code to detect only required strings ($RMC etc).
The TX port of the UART can be used for configuring the GPS and sending it
initial coordinates for quicker TTF. (Time to Fix)

Then I would bit-bash any of the other pins on the micro for controlling the
LCD.

Best Regards

David Huisman

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