For this file, gerbv is computing the wrong bounds:

%FSLAX46Y46*%
%MOMM*%
%LPD*%
G01*
%ADD10C,0.100000*%
D10*
X-20000000Y-20000000D02*
G75*
G02*
Y20000000I20000000J20000000D01*
X20000000I20000000J-20000000D01*
Y-20000000I-20000000J-20000000D01*
X-20000000I-20000000J20000000D01*
M02*

That gerber file is a drawing of a circle made by four arcs. But the arcs are on in the quadrants, they are arcs at north, south, east and west. The cricle circumscribes an aligned square with opposite corners are 2,2 and -2,-2.

In my testing, gerbv is reporting that the bounding box for the shape is too small:

Bounding box: POLYGON((-0.86811 -0.86811,-0.86811 0.86811,0.86811 0.86811,0.86811 -0.86811,-0.86811 -0.86811))

The issue was found here: pcb2gcode/pcb2gcode#784

I will look at it