ERP-FT and GFCI Breakers

Question

Is it acceptable to feed a relay in the Echo Relay Feedthrough Panel (ERP-FT) with a GFCI (Ground-Fault Circuit Interrupter) breaker? 

Answer

Yes, it is acceptable to use a GFCI breaker to feed a relay in the ERP-FT.

NOTE: The GFCI breaker would be in the branch feed panel not provided by ETC, therefore the breaker itself is not provided by ETC.