As far as I know this might not be possible : http://answers.splunk.com/answers/25553/how-to-set-radialgauge-text-value.html
But you can try adding a separate html code just below you chart to show the same information -
Here is example in simple xml -
<row>
<panel>
<chart>
<search>
<query>
index=_internal source="*splunkd.log"
( log_level=ERROR OR log_level=WARN*
OR log_level=FATAL OR log_level=CRITICAL )
| stats count as log_events
| rangemap field=log_events low=1-10000 elevated=10001-30000 default=severe
</query>
<earliest>-1h@h</earliest>
<latest>now</latest>
</search>
<option name="charting.chart">radialGauge</option>
</chart>
<html>
<h2 style="text-align:center;"> Label </h2>
</html>
</panel>
</row>
As far as I know this might not be possible : http://answers.splunk.com/answers/25553/how-to-set-radialgauge-text-value.html
But you can try adding a separate html code just below you chart to show the same information -
Here is example in simple xml -
<row>
<panel>
<chart>
<search>
<query>
index=_internal source="*splunkd.log"
( log_level=ERROR OR log_level=WARN*
OR log_level=FATAL OR log_level=CRITICAL )
| stats count as log_events
| rangemap field=log_events low=1-10000 elevated=10001-30000 default=severe
</query>
<earliest>-1h@h</earliest>
<latest>now</latest>
</search>
<option name="charting.chart">radialGauge</option>
</chart>
<html>
<h2 style="text-align:center;"> Label </h2>
</html>
</panel>
</row>