Sorry for the long delay in my response.

I appreciate your answers. Learned something new. A two pole GFCI breaker will function when no neutral load is connected as long as the pigtail is connected to the neutral bar. Replaced the existing FPE subpanel with anew Square D and new GFCI breaker 240v 15amp and it worked like a charm and passed inspection. I was always taught that you needed the neutral load for them to work properly; oh well learn something new.

Thanks for your time in answering my post