So I’m currently locked in a building and noticed that my stock TTGO GPS antennas would just barely get signal. However, I did have this cheap amplified antenna. OMG SO MUCH BETTER. If you need optimal GPS data for your usage, I recommend you buy one of these $4 wonders.
Also - I noticed that even the few layers (6?) of PETG in my cases made a huge difference in GPS signal quality. Removing the antenna from the case helped a lot. Therefore if anyone wants to work on either of the following two things that would be awesome:
Add a note to docs/FAQ.md mentioning this issue and the possibility of switching to a better antenna.
If you are making 3D printable case designs - make sure to use only a very thin layer over the GPS antenna.