Is GNU assembler bundled with GCC provided by Homebrew?

I'm on Intel Mac running the latest Monterey. Already have GCC 13 installed using Homebrew. I'm trying to build sectorlisp . Unfortunately still fails, because **as** (the LLVM assembler) rejected it. Perhaps there are some incompatibilities. So I setup a Debian VM, installed GCC etc, and succesfully built it. Hmm. I couldn't fine **as** executable in /usr/local/Cellar/gcc/13.2.0/bin. Perhaps there's an easy way to install GNU assembler on macOS?