Labeling Gauges 

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X Grid[{{AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> Automatic], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> "Unit"], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> Full]}, {AngularGauge[ Quantity[42, "Feet"], {0, 100}, GaugeLabels -> "height"], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> {"Value", "Unit"}], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> {Automatic, "Unit", "height"}]}, {AngularGauge[ Quantity[42, "Feet"], {0, 100}, GaugeLabels -> Placed[Framed["X", Background -> Green], Top]], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> Placed[Framed["X", Background -> Green], 42]], AngularGauge[Quantity[42, "Feet"], {0, 100}, GaugeLabels -> Placed[Framed["X", Background -> Green], {0.5, 0.75}]]}}]

Automatically generate and position labels, or provide specific labels and positions.

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