I'm pretty new to the Pi and my first effort is to get the Adafruit Ultimate GPS breakout communicating with my Pi 2.
Followed instructions in the Adafruit tutorial to the letter, got a fix with no problem (red LED flashing every 15 sec) with the antenna extension placed out of the window.
Using "sudo cat /dev/ttyUSB0", I can get output from the gps and the lat/long values buried in the text strings are OK.
Installed gpsd as per instructions, but only get "No Fix" when running "cgps -s".
Tried connecting to the GPIO instead, and using "sudo cat /dev/ttyAMA0", I can get the same output, but still nothing from "cgps -s".