License and Compiler Confusion

["Jason C. Wells" <jcw@highperformance.net>]

I am a FreeBSD user.  I was thinking of picking up a language and I am 
considering Ada.  I came across this:

	http://www.freebsd.org/cgi/url.cgi?ports/lang/gnat/pkg-descr

	Binaries built with this version of compiler are covered by the
	GPL license.  Use the Ada compiler bundled with GCC 4.0 and
	subsequent for LGPL licensing.

I also read the FAQ at adacore: 	
	
	https://libre2.adacore.com/dynamic/gnat_faq.html#licensing

I prefer to use a compiler that doesn't encumber my programs with any 
terms.  So I am confused by seemingly contradictory statements.  One 
source says I can't use gnat without encumbering my programs.  Another 
source says I can use gcc and my programs won't be encumbered.

Are gcc and gnat two different pieces of software?  I was under the 
impression that gnat was simply gcc with Ada related tweaks.

Can I write Ada 2005 programs without GPL-ing my code using a FOSS 
compiler?  How?

Gnat-3.15 doesn't confuse me.  I would use that except I suppose that if 
I am getting started I should write in the Ada 2005 spec rather than the 
95 spec.

Thanks,
Jason C. Wells