Bugs are tracked in GCC Bugzilla.

Ubuntu also tracks bugs for packages derived from this project: gcc in Ubuntu, gcc-10 in Ubuntu, gcc-11 in Ubuntu, gcc-12 in Ubuntu, gcc-13 in Ubuntu, gcc-4.0 in Ubuntu, gcc-4.1 in Ubuntu, gcc-4.2 in Ubuntu, gcc-4.3 in Ubuntu, gcc-4.4 in Ubuntu, gcc-4.5 in Ubuntu, gcc-4.5-armel-cross in Ubuntu, gcc-4.6 in Ubuntu, gcc-4.7 in Ubuntu, gcc-4.8 in Ubuntu, gcc-4.9 in Ubuntu, gcc-5 in Ubuntu, gcc-5-cross in Ubuntu, gcc-6 in Ubuntu, gcc-7 in Ubuntu, gcc-8 in Ubuntu, gcc-9 in Ubuntu, gcc-arm-none-eabi in Ubuntu, gcc-snapshot in Ubuntu, gccgo-5 in Ubuntu, gcj-4.2 in Ubuntu, gcj-4.3 in Ubuntu, gcj-4.4 in Ubuntu, gcj-4.5 in Ubuntu, gcj-4.6 in Ubuntu, gnat-4.2 in Ubuntu, gnat-4.3 in Ubuntu, gnat-4.4 in Ubuntu, gnat-4.6 in Ubuntu.