I wan't to install a 230volt pool pump for my swimming pool and first off I don't kow if there is a 2 pole 20 amp.gfci circuit breaker avalible and there is no neutral wire on the pump.How is this done?

Hopefully, there is a 2pole 20 A GFCI available for your panel. There is no special version when you don't use the load neutral.

Connect the line neutral (pigtail) to the neutral bar in the panel and don't connect the load neutral. It will work fine.