/usr/bin/g-wrap-config is in libgwrap-runtime-dev 1.9.13-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | #!/bin/sh
chk_is_guile() {
  if [ "$1" != guile ]; then
    echo "unsupported language: $1"
    exit 1
  fi
}
pkg=g-wrap-2.0-guile
case $1 in
    --version)
	echo g-wrap-config 1.9.13
	;;
    --c-compile-args)
	chk_is_guile $2
	pkg-config --cflags $pkg
	;;
    --c-link-args)
	chk_is_guile $2
	pkg-config --libs $pkg
	;;
    --guile-module-directory)
	pkg-config --variable=module_directory $pkg
	;;
    *)
	echo "unsupported option/argument $1"
	exit 1
esac
 |