MC6 / iPad's Garage Band

I find that Garage Band on my iPad is a great way to document those musical ideas that you get when you are away from the computer / studio.  Once in a while, the idea turns into something more, and this is where I wish Garage Band could export midi data to MC6.  The next best thing I suppose is to export as an audio file and lay it into MC6 tracks.  My question, is there any way to sync the beat of an audio file into the timing grid of MC6?  So far I've done this as trial and error, but you can imagine that time slips further off the beat the longer the song is.  It would be great if there were a way for MC6 to analyze the audio file and compute the BPM, and lock it into the time grid.  Am I asking too much?
 
Any thoughts?

I think the click track would be embedded in the audio file so I couldn't mute it in a final mix.  Plus, I agree with your comment regarding the quality, etc.  It just would have been really cool to be able to export out of Garage Band and use that data.
 
Oh well.
 
Btw, is audio snapping something that can be done in other programs?

click and metronome do not get recorded to the final mix or to any track for that matter.
 
Unless you specifically have a track dedicated to the click/metro sound....and accidentally leave it unmuted in the final mix down,  nope, it should not be in that final mix.