I'm 25 I want to get my g.e.d and culinary arts degree but I'm 25 and they won't take me why can't be for 18 to 29 or something like that

Why do you think you need job corps to attain your goal?

Call your county's community college. They will help you get your GED and maybe even have a certificate program for culinary arts or will at least offer you core courses and then advice on where to transfer to finish such a program.