Los Angeles Superior Court Judge Reva Goetz, who also oversaw Britney Spears' conservatorship, allowed Frederic to manage the 95-year-old's affairs for six months.
He has also been ordered to hand in monthly financial and medical reports to Gabor's daughter Constance Hilton's lawyer during the period, reported Ace Showbiz.
Frederic's conservatorship efforts will be evaluated by the judge in a hearing set on January 9, 2013.
Hilton fought for Gabor's conservatorship, claiming her mother was "increasingly isolated" and "heavily sedated" while under the care of 69-year-old Frederic.
She also accused him of mishandling the actress' finances and asked for more time with her mother. In the ruling, she has been granted weekly visits without his presence.
"Victory!" Frederic, who is Gabor's ninth husband, said outside the courthouse.
Hilton, who is Gabor's child from her marriage to Conrad Hilton, said, "I just wanted to protect my mother and me."
Her lawyer Kenneth Kossoff additionally stated his client only wanted to "make sure Zsa Zsa's money is used for Zsa Zsa's benefit and not for anybody's birthday party, billboards or mayoral campaign."
Gabor has been confined to her home after having a hip replacement surgery and having her right leg amputated.
She was described as being "bedbound, unable to hear or see clearly, unable to respond or answer questions, becomes agitated when outside of familiar environment" by Dr Debra Judelson during the court hearing.
