Our GFCI's cannot be split fed. I'm unaware of any manufacturers that offer one either. Since the GFCI is measuring imbalances in current between the hot and neutral wires of a circuit, you would not be able to use both hots on this circuit with a GFCI, unless you had two neutral wires. One of the hot wires would need to be capped off, and the the remaining receptacles would need to be common fed. If you'd like to further discuss your application, please call our support team at 800.824.3005.