GPS support for OpenAstroTracker

I designed this thing to integrate the NEO-6M GPS module in a deported way from the MKS Gen L in the OpenAstroTracker.
The GPS antena is consequently as far as possible from the motors and without obstacle overhead.
This thing allows to maintain the USB cable and the one to the LCD in the set of the following things:
- https://www.thingiverse.com/thing:5440517
- https://www.thingiverse.com/thing:5440484
- https://www.thingiverse.com/thing:5440460

Needs for the assembly:
- 2 screws M4x12mm
- 2 T-nuts
- 6 screws M3x6mm or 8mm
- 2 M3 heat install brass inserts


Check that the box does not collide with the AutoPA addons.