Before you filter from the Gila, you may want to read this.
viewtopic.php?f=81&t=8385&p=102255&hili ... er#p102255
Also, HAZ members are encouraged to make Water/Spring Reports after their hike. This information can be found while looking at the HAZ Map for the area you have in question.
It's much easier to choose a source if you have your planned track on the map first in Route Manager.
Click the water Icon in the upper left,
Click on the blue water drop (grey means dry, blue circle means no report) to see the water report for that source.
from this point you can also "Convert to Waypoint" to add this as a waypoint for your GPS Track.