GST on Sub Contract - Labour

I am Doing Highways Contract Work I have given a Pure Subcontract of Labour Charges to one party and he  is not having GST Number ( I want to know For Labour Subcontract  I want to pay GST or Not  and GST Rate )  if the party is not having GST how can i pay  in RCM how much is GST Rate and ican take the amount in same period The Subcontract is getting more than 45,00,000/- the sub contractor to want to register and apply GST or Not  monthly i am giveing Rs. 10,00,000/- as labour subcontract no one is having GST what to do