Getting gum out of hair IS a chore. But if you insist, here goes.

1) Soak your head in water, the colder the better

2) Freeze your hair. Easiest to cut a circle out of a piece of thick cardboard, open the freezer door on your fridge, put the cardboard where the door was and then put the part of your head with the gummy hair against the hole and stay there for about 1 1/2 hours

3) Get your head out of there and call a carpenter to bring chisels. If he's done good vcabinets before he'll cleanly and accurately chip the gum off your hair

Voila.