If its WL3 from GKP it will surely confirm. If you book from IRCTC this will come under PQWL (Pooled Quota waiting list) which is very tricky and difficult to confirm. You can book the ticket from GKP-SBC and later on you can go to the PRS counter 24 hrs before shcheduled departure of the train with copy of your ticket and original ID and get boarding point changed to LKO