That's not on my TODO! But Gambit does have support for TCC. For example you can use TCC to compile a file to a dynamically loadable object file (aka shared library). The compilation is faster than gcc and the code size is typically smaller too:

  $ cat hello.scm
  (display "hello!\n")
  $ gsc hello.scm
  $ gsi hello.o1
  hello!
  $ ls -l hello.o1   # this is generated by gcc
  -rwxrwxr-x 1 feeley feeley 18152 Mar 13 17:16 hello.o1
  $ rm hello.o1
  $ gsc -cc "tcc -shared" hello.scm
  $ gsi hello.o1
  hello!
  $ ls -l hello.o1   # this is generated by tcc
  -rwxrwxr-x 1 feeley feeley 4432 Mar 13 17:17 hello.o1