Guardianship in CaliforniaEstablishing Guardianship in CaliforniaCalifornia guardianships give an adult who is not a minor child’s biological or adoptive parent custody rights over that child and/or manage the child’s property; however, the biological parents do not permanently lose all of their parental rights. A guardianship ends when the child turns 18 and graduates from high school or if the court decides to terminate it. Continue learning… Detailed Guardianship InfoHelpful FAQWhat is a guardianship?What is the difference between guardianship and adoption? More Guardianship FAQ Guardianship: Where to BeginGuardianship FormsBegin the California guardianship process with these legal forms. Guardianship StatutesCalifornia guardianship law. The technical, legalese filled rules governing guardianship.