Use specific local gcc and related libraries with Homebrew

I would like to use Homebrew to install some stuff,

In the mean time, I have already installed my local gcc, and I want Homebrew to use this specific one(this gcc at /usr/local/bin/gcc is frequently upgraded by myself).

Unfortunately, Homebrew always figure out its gcc dependency, and related libraries, e.g. gmp and mpfr, then download them all at /usr/local/Cellar.

I just want to keep things simple, use my installed gcc, link with the existing library, say gmp and mpfr(at /usr/local/lib), is it possible with Homebrew?