Adafruit Assembled Data Logging shield for Arduino : ID 1141 : $13.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Adafruit Ultimate GPS HAT for Raspberry Pi A+ or B+ Mini Kit : Electronics
Adafruit Ultimate GPS HAT for Raspberry Pi A+/B+/Pi 2/3/Pi 4 [Mini Kit] : ID 2324 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Adafruit FONA 808 Shield - Mini Cellular GSM + GPS for Arduino