He's Been Parentless His Whole Life.

Jake always had problems, ever since his dad left, his mother was neglectful going out to random places to hook up with other males, he's never had a parental figure as he had to grow up on his own, then he was kicked out of the house to live with his sick Grandma and Gina, Gina and him were inseparable even years later when Captain Holt enters the precinct, Gina was really the only one that understood him.

but when things go down can two men help Jake through this?

Warnings: Spoliers obviously
past depression.
and Jake's parent's are more ...... jerks in this too.