Share project for GarageBand IOS and GarageBand MAC OSX

Not all GarageBand versions are compatible, what are your versions?

See this list: GarageBand for iOS and Mac: Project compatibility

You can either transfer your project using iCloud or using iTunes.

Did you share your project to iTunes on your IOS device? Then this should work:

Share GarageBand songs

• Tap the Navigation button in the control bar, tap My Songs, then tap Select.
• Tap the song you want to send, then tap the Action button .
• Tap Share Song via iTunes.
• Do one of the following:After you tap the iTunes icon, you can choose the quality of the file GarageBand sends to iTunes. You can also add artist, composer, and title information that appears in iTunes.

  To send the song as a GarageBand song, tap GarageBand.

• Sync your iPhone or iPod touch with your computer. In iTunes, the exported song appears in the Documents list in the File Sharing area when GarageBand is selected.
• Do one of the following:
  • Drag the song from the GarageBand Documents list to the Finder.
  • Click Save As, navigate to the location where you want to save the song, then click Save.

You can open the GarageBand song in GarageBand on your Mac, or play the audio file in iTunes (or any compatible audio application) on your computer. GarageBand songs cannot be opened on a Windows computer.

Or if you want to use iCloud, try this:

Use iCloud with GarageBand

I have GB version 10.0

And on your iPad? Do you have GarageBand 2.0? Which iOS version?

And have you shared the song as a GarageBand song to iTunes, like I described above, and not as an audio file?