Reply To: confused about GCB …help! February 27, 2023 at 8:49 am #210444 mitchParticipantdepends on how much covid adv you had, the gcb for a 3r lease is 600 take away your adv and whats left is what you will get as gcb.bbut there is a new lease pmnt now of £750 which you will get after picking up the car.