This source is part of ESPboy project by RomanS
ESPboy GPS Navigator is an app for GPS ESPboy module turning your ESPboy into the portable navigator.
https://www.youtube.com/channel/UCsMjlCb8CK-Cw54lRrkpbQw
You can DIY ESPboy GPS module easily. Just use GY-NEO6MV2 module from aliexpress and connect VCC,GND,TX to ESPboy's Vcc, Gnd, D8 pin