GetFeatureInfo results:

Layer 'GDPS.ETA_GZ'
  Feature 0: 
    x = '-19052331'
    y = '6542076.7'
    value_0 = '-0.54730225'
    value_list = '-0.54730225'
    class = '-10 - 14 dam'
    red = '-1'
    green = '-1'
    blue = '-1'