Lenders will count more stable sources like VA disability compensation , military retirement pay, or current employment wages to approve your home loan.
You cannot "redirect" your GI Bill funds to a lender for a down payment or mortgage; the payments are sent to you (or your school) for educational purposes. How to Use These Benefits Together can i use my gi bill to buy a home
If you are a student veteran, it is often recommended to wait until you have a or a history of civilian wages to secure the best loan terms. Can I Qualify for a VA Loan Using GI Bill Assistance? Lenders will count more stable sources like VA