Many FoldApe4 users report GPS problems, this also happen to me. So I decided to check how the factory GPS installed in a different place would behave and also compare it with other modules. So here we have front mounts for 3 modules: DarwinFPV GPS, Beitian BK-182 (probably others Beitian 18x module too) and HGLRC M100 mini.
Parts printed in PLA+ (as shown on stl preview) with brim (no suppport), 0.2mm layer, nozzle 0.4mm.

My conclusions after the tests (same place, similar time of day, open space outside the city):

• Darwin GPS: the slowest cold start, surprisingly many satellites - 36 before before take-off, 36 during the flight, but unfortunately few times it happened to lose satellites at all for 20-30 seconds,
• Beitian BK-182 GPS: fastest cold start and fastest hot start, 16 satellites before launch, no problems during flight, stable 15-16 satellites,
• HGLRC M100 Mini GPS: faster cold start than Darwin GPS, 9 satellites before take-off, no problems in flight, after 4 minutes usually 16 satellites (variables 12-17).

Auto configuration in Betaflight OFF for DarwinGPS and ON for BK182 and M100 Mini.

In the next step I will check the M100/BK182 with the rear mount, and then I will post my design.

My other 3D printed parts for DarwinFPV FoldApe4 (the list will be updated):

Stand for DarwinFPV FoldApe4
https://www.thingiverse.com/thing:6637191

Feet for DarwinFPV FoldApe4 drone
https://www.thingiverse.com/thing:6705054

Buzzer Holder for DarwinFPV FoldApe4
https://www.thingiverse.com/thing:6712437

DarwinFPV FoldApe4 GPS Rear Mount
https://www.thingiverse.com/thing:6719715