Good Morning America star Ginger Zee took to Instagram on Saturday to share an emotional family milestone - the graduation of her eldest son from kindergarten."Rising kindergartner over here @benaarontv," Ginger captioned the picture of her and husband Ben Aaron with their eldest son Adrian.The young boy wore a blue shirt and had a big smile on his face, as he posed wearing a cap in front of a board that read "congrats" and was covered in illustrated caps and gowns.MORE: Ginger Zee shares