> Can Gambit be used to develop apps for the Android?  If so, are there any docs on it?

Google suggests this:

<http://seanchapel.blogspot.com/2010/10/gambit-scheme-on-android.html>

These steps are no longer necessary, gambit has been fixed to compile correctly using NDK 5, I haven't tried 6 but I assume it should work as well.
 

and this:

<https://github.com/seoushi/gambit-android-example>
Let me know if this doesn't work for you and I'll help you out.

-Sean Chapel