Can't change gasPrice on jsonrpc params

[buy-aka]

How to change gasPrice while withdraw geth blockchain coin?

{"jsonrpc":"2.0","id":1,"method":"personal_sendTransaction","params":[{"from":"0x6cc0143662a4eed45d17e4857ab8b962e2c3aebf","to":"0x20ecd9032ef27433aab52a57ccb1363612382a0c","value":"0x8963dd8c2c5e0000","gas":"0xa410","gasPrice":"0x0"},"password"]}

[AzulPretoBranco]

I'm having the same problem, @buy-aka did you manage to find a solution to this?