Guilty Gear X2 question

I’m attempting to frc gun flame so I can sort of run with it as a shield. During what period of the attack would I do this? Also how can you frc vaipa?

In training mode, there’s a setting which turns on your inputs. When you do a move, the input screen turns blue meaning that’s the precise time you need to FRC. I’m not really knowledgeable about GG so I’m not sure if what I said was right. Which version of X2 do you have specifically?

that actually helps a lot. thank you.