No, there is no such thing as a grievance transfer law, or indeed any law either giving you the right to a transfer or the right to file grievances. Sometimes a contract, like a union or collective bargaining contract, may give you these rights; but if you don't have a contract, the employer decides which location you work at, whether to allow a transfer, and whether to have any procedure for filing a grievance, and is free to not have such a procedure.