Try something like this:
Image2 = Show[g2In, g2IIn, go, go1,
Graphics[{Inset[Import["C:\\Users\\user\\Desktop\\New folder (3)\\SAM_4058.JPG"], {1, 1}]}],
AxesLabel -> {"x", "y"}, ImageSize -> 400, PlotRange -> {{-1.2, 1.2}, {-1.2, 1.2}}]
Note that I don't know what size you want the image to be or where. Hopefully, you can take it from there. If not, ask some more questions.