Part of any good answer to your question would require knowing how long ago the guardianship was created by the Court. Without knowing that, and simply as some general thoughts, your daughter likely retains the ability to petition the Court for modification and/or termination of the guardianship. Her success on that front would include overcoming some of the factual challenges that you've identified.
The good news for you is that the Court has already determined that your appointment as guardian is within your grandchild's best interests. In my experience, courts are not always quick to reach that conclusion and will look for virtually any responsible way to keep a parent-child relationship intact. I have a difficult time seeing the Court alter its feelings about the situation unless your daughter presents some pretty compelling evidence that the environment she can now provide is remarkably better.
If it is particular circumstances or an evidentiary burden that you're trying to hunt down, take some time to visit with a local guardianship attorney. Best of luck.
This answer does not constitute legal advice. I am admitted to practice law in the State of Texas only, and make no attempt to opine on matters of law that are not relevant to Texas. This answer is based on general principles of law that may or may not relate to your specific situation, and is for promotional purposes only. You should never rely on this answer alone and nothing in these communications creates an attorney-client relationship.
The answer of attorney Thomas is a good one. May I add a couple of thoughts to his? If your daughter has little or no money, she'll have a hard time finding an attorney to represent her in reversing the guardianship. She might qualify for "free" legal representation from an organization such as "Legal Aid", but such organizations screen new cases carefully to preserve their limited resources and not use the resources on representing people who don't really have a meritorious case. To convince Legal Aid to represent her, your daughter would need to show that that the process where she consented to guardianship was flawed (i.e., someone lied to her about the consequences of her giving consent). Also, if she retained the power to revoke her consent to the guardianship (many daughters in this situation do just that), then the Court would not automatically revoke the guardianship. Rather, the Court would want credible evidence that her care for the child would be better for the child than your care. That's basically how it works. Good luck.
Another issue that may cut in your favor is how long has your grandchild been living with you. What controls is "best interests of the child" here in California and I would expect that would be the case in UT as well. If the grandchild has lived with you for 5 years, they are not going to let Mom waltz in with no job or money and take him away. If it is three months, even so, the Court found it in the best interest of the boy to be with you. She would have an uphill battle. I would wait to see if she ever comes up with papers in court to do anything but you might want to consult with the attorney who helped you with the Guardianship to verify what UT law is here.
If you liked this answer, click on the thumbs up! Thanks. Eliz. C. A. Johnson Post Office Box 8 Danville, California 94526-0008 Legal disclaimer: I do not practice law in any state but California. As such, any responses to posted inquiries, such as the one above, are limited to a general understanding of law in California and not to any other jurisdiction. In addition, no response to any posted inquiry should be deemed to constitute legal advice, nor to constitute the existence of an attorney/client or other contractual or fiduciary relationship, inasmuch as legal advice can only be provided in circumstances in which the attorney is able to ask questions of the person seeking legal advice and to thus gather appropriate information.