Hi Astronerd,
Take a look at this page for example : www.hobbytronics.co.uk/usb-connector-pinout
Vcc and gnd are easy to guess, maybe lookong at the other side of the pcb can help on Tx and Rx.
Regards
Franck
Yes there is a chip and other bits, but nothing that tells me what I need to know about removing the USB plug and wiring directly to the pins on the rpi3...
According to the G7020-KT datasheet (innovictor.com/pdf/UBX-G7020-Kx_DataShee...01)_Confidential.pdf section 6.1.1) , pin 8 is for usb_DM (D-) and pin 10 is for usb DP (D+).
According to the usb connector design central pin 2 is for D- and pin 3 is for D+, pin 1 is for vcc and pin 4 is for gnd
So if I not wrong this shoudl be something like this :
Please double check vcc and ground before plugin !!
I am very curious how it works - I would have thought, but do not know, that using the GPIOs of the Pi instead of the USB interface will require another driver that addresses the Pi‘s GPIOs. This is why I was pointing you to the astroberry-diy repository. However, could be that in your case, specifically for the TX/RX and V, GND it does not matter.
It might be necessary to also update the file /etc/default/gps (or similar).