|This is an official map from the cemetery.|
There is a list of burials on a website that uses the letters A - L and numbers 1 - 31. This is the person's own layout, not the official one for the cemetery.
Also, their Grave numbers are backwards... 10 is actually 1, 9 is 2, etc.
Find the Letter and Number intersection and you will see the true plot location.
Example: G-19-07 is actually B-179-04 (Sec B, Lot 179, Grave 4).