Linux or GNU/Linux

[Jonathan Ryshpan]

On Fri, 2012-08-03 at 14:36 +0100, Alan Cox wrote:
> In some cases - by code volume the FSF is not the biggest contributor,
> even when you include (as they like to) all the third party code they
> took and labelled GNU. In the case of the largest and most common
> Linux
> distribution today there is almost no GNU code in it: Android.

I hope this isn't a foolish question; I'm not familiar with Android
development.  Is the standard development suite for Android based on
gcc?