Flora GPS on a Nano

Hi I have purchased a Flora wearable GPS unit which I have attached to a Nano. I have adjusted the code to put TX as pin 1 and RX as 0 but I am not getting any meaningful output on the Serial Monitor. Are a USB connection and a serial connection able to co exist or are the two conflicting.

If I have read things correctly from the respective product pages.
The NANO uses 5 V logic and the Flora GPS uses 3.3V logic levels.
If thats the case thats not going to work without a level shifter in between the two.Thats