That is impossible, because the heart piece can only be obtained as young link, and young link is only able to wrong warp into cutscenes and there is no cutscene up there unfortunately. There are a couple wrong warps that will take you to a cutscene, you'll fall oob, and then you'll respawn in an area with no CS but those aren't common and I don't think there are any around gerudo fortress. Mostly every WW related to GF just takes you to the end credits :P
What? A wrong warp should work the same whether your young link or adult link (unless you land on oob geometry that only pushes adult link off [points to avatar]). In 64, you can wrong warp to areas that don't have any cutscenes fine, so not sure if you're talking about a 3D only thing, or if you have no clue what you're talking about.
But anyway, unless you get lucky and find a cutscene that puts you where you need to be, its impossible to wrong warp to the heart piece in Gerudo Fortress. The two possible entrances that you'd wrong warp to are 02DE (which puts you at the top of Gerudo Fortress) and 04B2 (Which puts you in the Thieves Hideout, next to the entrance to the top of Gerudo Fortress). The only method of wrong warping at your disposal would be Farore's Wind, but the problem with that is that is that the two entrances you'd have to store in Farore's Wind, 02DA and 04AE, put you at Gerudo Fortress and the same segment of the Thieves Hideout respectively... meaning that you'd just end up at the spot where you set Farore Wind anyway (unless a cutscene plays and changes that).
