User blog comment:Miskos3/Fairy Tail Chapter 490: Fairy Tail Zerø, Review/@comment-5303512-20160621143045/@comment-7418318-20160622064326

I'm very sure we can rule that out.

Historia call up memories of a person. Gajeel never seen nor even heard of Zera, so it would be impossible to summon her out of his memory.