Hi again,
Im not sure i can read your drawing accurately. For example, what is the angle of departure for your plot at the pole drawn at the origin where you have the X right on (0,0) ?
Also, what is the approach point where the circular part of your drawing meets the x axis? It looks like -5/3 on your drawing, and if that's correct then did you go back and check that in your kGH equation to see if it actually has a root there or near there?
Also, did you calculate the max (or min) value of k for the gain where the plot crosses the j axis, and if so (you should have i think done this) did you check it in your kGH to see if it produced a root when k is equal to the found value (that would be on the j axis)?
I ask these questions for good reasons that i believe will help you, and i'll post my own root locus after you try some of the above.