
I was having this thought for a while now. I hope some of you will read.
I think that gio is being kidnapped when he was a child. Remember the panel where Gio and Felix as a child meet in the playground and felix said that he wanted to marry gio. Gio was like hiding from someone that time and felix wanted to protect him. Gio was scared that time but he feel happy when baby felix Tried to protect him. And then when his mother came. Felix said that there was someone in the playground hiding with him (Which is gio) I think that time Gio was gotten by the one who kidnapped him so Felix and her mother didn't see gio again.
This is only my imagination but I think in the past gio tried to escape and became an orphan and his current mother and father take care of gio and that's how he became Daniel Kang.
His mother still wants to find him but I think the one who called Lee gang on the phone (in the recent chapter which is his father (maybe)
Know that gio is still alive and don't want to acknowledge him so he tried to cut all the information about gio. But lee gang is finding his way to find gio because of his Mother.
Btw, this is only what I think. I'm still waiting for other updates