He's said in his blog that he would have to be convinced "by reason", not a baseball bat.
I take that to mean he should be convinced by God presenting evidence to him which convinces him that God is real.
He probably means that people should present evidence which convinces him God is real.
I see no reason both can't happen . . . God can use a person (or maybe even this site!) to present the evidence to PZ Myers, instead of a dream or vision.
In this section of the forum, please feel free to start your own threads not to ask whether Myers can be reasoned with, but to present or discuss evidence for God's existence.