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Once the commissioner appoints a guardian ad litem, if you feel that the GAL cannot be neutral, then someone in your situation can file a Motion to Recuse Guardian Ad Litem Appointment and to Appoint an Alternate. Actually, the motion may be titled several ways as this is a fairly non-standard motion. What it asks is the primary concern of the Court, not the title.
The motion can be filed, the other party served, and the commissioner will hear it. They do not have to agree to it, however, and may confirm the appointment over your objections. Typically they will, unless one can prove by clear evidence that the GAL is not neutral and is biased.
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