May I know how can I send a RawTransaction to Quorum blockchain? Can I just use the send rawTransaction method that I used in Ethereum and web3 and just to set the gasPrice to 0? Will it work?
Yes, the Quorum sendRawTransaction() method will work the same as in Ethereum. You just need to set the price to zero.
Note that if you are using web3 v1.0 or later, that method has been renamed to sendSignedTransaction().