Gta under gst

Hello One of my client{ status individual} is having a annual turnover of ₹ 1.5 Crore and provides GTA services only to registered dealer by his own trucks and also from truck hired from others. Now my doubt is that 1. Is he liable for GST registration? 2. Supply made from hired truck and owned trucks comes under RCM? 3. Do he has to pay GST under RCM on freight paid on truck hired? 4. Reciver of supply of GTA services sent goods to his customer in other states also. Does GTA has to obtain registration under each state and also is it a Inter state supply ? --