Liam, I was very close to both my Grandmothers and both of my Grandfathers. It really hurts when you lose one of them. I'm very sorry for your loss and you and your family are in my thoughts and prayers.
Julie, Liam is blessed to have you. Keep giving him your love and support. Each thing you go through together makes the bond you have together closer. Gary's Grandmother, who helped raised him, passed away in 2000. He has told me lots of times that he was glad I was there for him.
May God bless you all,