macOS Mojave 10.14.6
Radeon RX 580 GPU
Version 2.80 (2.80 2019-07-29)
Blender seems to be working fine, but BlenderGIS add-on not working on this system. Author of add-on suggests the python is misconfigured in Blender build.
Seems like the sqlite python module is not available in your Blender installation which is anormal because it's a standard python module. The issue is related to Blender itself not BlenderGIS. I think there is a missconfig when the Blender team compiling this MacOS binary and it must be reported into Blender bugs tracker.