Yes, Vivo Y91 does have the dual rear camera set up. It has 13MP + 2MP rear camera set up.
No. Vivo Y91 does not have the hybrid sim slot. It has 2 dedicated slots for sim cards and a dedicated slot for the MicroSD card.
Yes, Vivo Y91 does have the GPS support.
Yes, Vivo Y91 does have the memory card slot. You can use 2 Sim cards and a MicroSD card at the same time.