In case of Transaportation of goods Place of Supply will be the place at which goods handed over for their transportation... You have to pay CGST & SGST on RCM basis if transporter has not charged you GST in such invoice issued to you
1) Place of supply, in case of transportation of goods, to a REGISTERED recipient is the location of such recipient. In this case, it is Haryana.
2) If the GTA is also located in Haryana, then CGST & SGST to be paid on RCM. But if the GTA is located outside Haryana, then IGST to be paid on RCM.
Note: As I understand, POS is the place at which goods are handed over for transportation is applicable only when the recipient of service is an UNREGISTERED person.
Any other interpretation is welcome.