Gibson les paul headstock repair?

my dad cracked it a few years ago and i want to fix it how much will it cost? i loosened the strings so it wouldn't have strain on it... it's not completely cracked off but still you can't play it. is there a way to fix it with like gorillia glue or wood glue or something with out it losing it's like originality or something (my mom said it would or something?) please help? i'm only going to be making maybe 100+ dollars this summer so it MUST be cheap enough but maybe my sis can lend me some of her summer money...