Sir, this is nothing but backfiring.
When service tax was made applicable on transporters there was nationwide strike for more than a month. Government being smart, introduced RCM on transporter.
Now again transporters associations should make representation to government for removing RCM. Earlier you enjoyed the exemption from service tax but same was payable by service recipient now it is working against you.
The confusion is still prevailing as to whether gst under RCM paid by service recipient at 5% can be considered for input or not.
As a GTA you will be passing on the cost of GST paid by you, big companies will avoid GTA and will start to own their own transport vehicles to avoid extra cost for which they can get credit!!!