Note the language in the article. Neither the Donor or GC are considered a Parent.
"...granting John and Bill's request, supported by Mary (gestational carrier via donor ovum and one father's sperm), to remove Mary's name from Sarah's birth certificate, Madame Justice Jacelyn Ann Ryan-Froslie of the province's Court of Queen's Bench, noted that the law defines a "mother" as the woman who delivered a child, and presumes she is also a parent, which is no longer always true.
Being a parent is an important legal designation, she wrote, and it does not apply to Mary, who surrendered all parental rights to John and Bill after Sarah's birth."
Full article here: