GST on GTA

I would like to know what is the GST rate on GTA, on RCM and whther ITC is allowed on payment on cash basis, similar to service tax RCM.

If no ITC is allowed to anyone then GST on GTA is complete tax burden on RCM to service recipient ( increased Transport cost on goods by way of GST ).

What does composite goods and service mean for GTA along with goods.
ex. Supply of goods to your purchaser along with freight.
how is this taxable in GTS and whether ITC is available or not and to whom is it available if charged separately on invoice or compositley along with Goods ie. FOR rates.