Just tried it out in both FD and Rainbow Cruise. They both worked successfully, no freezes whatsoever. I used Riivo.
@KC: Maybe you're Wii just dosen't leik youh D:
Well, this is a relief. Thanks for the feedback. :D
Regardless, if the stage really has problems with Gecko, I'll still need to fix it.
In the mean time, if anyone else uses gecko and has tried the stage, I'd still appreciate your feedback.