Hi Turbanov,
If you haven't seen this already, check out
<http://www.gnu.org/graphics/graphics.html>. That site has a small
collection of "GNU" artwork.
For a GCC logo specifically, I'd expect it to have elements that
reflected GCC itself, such as its organization, goals, or background.
The present logo reflecting GCC as the "egg" of GNU is interesting, but
it would be neat if a logo also reflected the enormous diversity outside
of the GNU system itself that GCC is a part of. GCC is not just a
servant of GNU; it is the bold herald of free software for all machines,
operating systems, and peoples.