Step 1: Understand the concept.
Under the Goods and Services Tax (GST) system, the total GST is divided equally between the Central Government (CGST) and the State Government (SGST).
Thus,
\[
\text{Rate of CGST} = \text{Rate of SGST}
\]
Step 2: Apply the given information.
It is given that CGST = 9%.
Hence, SGST = 9%.
Step 3: Conclusion.
The rate of SGST is 9%.
Final Answer:
\[
\boxed{\text{Rate of SGST = 9%}}
\]