Yes, I too dont know if this overtake happened for real or not. But it is possible as Garib Nawaz had to arrive UBL at 6:30 and it will arrive at 6AM itself as it departed GDG at 4:50, and the PFs at UBL would be full at 6AM:PF-1 for RC, PF-2 for BZA-UBL-SBC Pass, PF-3 for Siddhaganga, PF-4 for TPTY Pass, PF-5 for BJP pass. This passenger departed GDG at 5:10, reached UBL at 6:20AM and it had to run back to SBC as Passenger at 7AM. So there are chances that Garib Nawaz might have been regulated at Hebsur and the passenger overtook it. But all guesses only, dont know the reality.