Bryant said she waited to open the card on her birthday so that "it gave me something to look forward to."
"I miss your smile everyday," the 17-year-old wrote about her late sister.
The mom of the teen, killed in January with father Kobe Bryant, asked fans in emotional posts to #PlayGigisWay.
“My king, my heart, my best friend,” she wrote in a heartfelt Instagram post.
In a sweet Instagram post on Monday, the mother of four shared a snapshot of herself alongside daughters Natalia, Bianka and Capri.
"The behavior is inexcusable," Sheriff Alex Villanueva said of the deputies who took and disseminated the photos.
Her attorney said those responsible for the "unspeakable violation of human decency" should face the "harshest possible discipline."
The grieving mother and widow offered an intimate glimpse into the Bryants' sweet home life.
Hosted by the Los Angeles Lakers at the Staples Center, an emotional service celebrated the lives of the NBA legend and his daughter.
The suit accuses Island Express Helicopters of negligence in allowing the pilot to fly the helicopter in heavy fog.