diff --git a/app-portage/grs/Manifest b/app-portage/grs/Manifest
index c9f7d3f..b65fff3 100644
--- a/app-portage/grs/Manifest
+++ b/app-portage/grs/Manifest
@@ -1,5 +1,7 @@
 DIST ISO-1.tar.gz 2887967 BLAKE2B 0ae9d9c4078974316d6865a8601705f7c69c8305d8401835bfa544d14a90b3688ea6b881a1c07bcb969fe2b15f210d05f114ebaf3af5ba6f1ae3705d395f1603 SHA512 50bd9bcaa3d1900763936beb4801fd9e5cb963e39d51c39c9cc9a8d160469db1b0c6fffae01bbb5d5d5c6d4e42d84a6c499c465bbdd964835c2d190785eed52d
 DIST grs-0.1.tar.gz 36442 BLAKE2B b66f65c5680d843faf5bd7d04d8d10d17e765906f3c88df1a617973fc2691b8db5a030894085925128d0d1a16a9d52ed3e68dc312a592e68f2b85df12f5f362a SHA512 0beb3d1d39c0e708f257369205ad97d9a014dd4b11bafc77eda56efe020505047f4469c50fa44b768d5df363b7c9a5d23cad1092e384163d4c8781b9e916b78c
 DIST grs-0.2.tar.gz 36462 BLAKE2B 875d4eecbb7c95d23587faada729ed1b3653038c575f4d4ad044790e634e6500210b8b22fa17523b779ca0c27923349d1d18bb6f961512853309a1ccf4d72a70 SHA512 debc8903ed800b95a063da7635908e7eff76a28837ef1b6b42a6baac21ecf50b44a1b5ec82ad8eb4b0d1d2879267619a82db48ecc88775b8a8099b0fa0bd99f6
+DIST grs-0.3.tar.gz 36401 BLAKE2B 8ab2216086ab71a06f1fc46cc4bfbd24d6d37493f4a9efad419e3936f900cfb0604fea6fd059d5703a825f144c4e8d32ecea8bc2e41f9fa0f27c72458463d3c9 SHA512 537d71ecf4bcbab125d707484a249c9e1a799dba26a690d9869b2faa1b8b400f8114767b02f832c2dc666c38290a9882c04863a29d76af5810244ff5c3199116
 EBUILD grs-0.1.ebuild 1439 BLAKE2B 47fdc47bfddcb6dfc9bbb8e0f85c81abe34207ca7bc6fa6efd9d35ce7f24f5bc37982d568d2deb3341d0be05edd42d6db9828f17b2f0a0c52214f1396641c3d3 SHA512 6d9424608b9e7e904b0ebeba98232da5fc19fed0f8535906dfdb8214352c8662e29c3688b9915e451c7803a7ef1e682caa62d49b3bd59f5df32a9c91ce0bea43
 EBUILD grs-0.2.ebuild 1439 BLAKE2B 47fdc47bfddcb6dfc9bbb8e0f85c81abe34207ca7bc6fa6efd9d35ce7f24f5bc37982d568d2deb3341d0be05edd42d6db9828f17b2f0a0c52214f1396641c3d3 SHA512 6d9424608b9e7e904b0ebeba98232da5fc19fed0f8535906dfdb8214352c8662e29c3688b9915e451c7803a7ef1e682caa62d49b3bd59f5df32a9c91ce0bea43
+EBUILD grs-0.3.ebuild 1439 BLAKE2B 47fdc47bfddcb6dfc9bbb8e0f85c81abe34207ca7bc6fa6efd9d35ce7f24f5bc37982d568d2deb3341d0be05edd42d6db9828f17b2f0a0c52214f1396641c3d3 SHA512 6d9424608b9e7e904b0ebeba98232da5fc19fed0f8535906dfdb8214352c8662e29c3688b9915e451c7803a7ef1e682caa62d49b3bd59f5df32a9c91ce0bea43
diff --git a/app-portage/grs/grs-0.3.ebuild b/app-portage/grs/grs-0.3.ebuild
new file mode 100644
index 0000000..9bb94f0
--- /dev/null
+++ b/app-portage/grs/grs-0.3.ebuild
@@ -0,0 +1,64 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="7"
+PYTHON_COMPAT=( python3_{8,9} )
+DISTUTILS_USE_SETUPTOOLS=no
+
+inherit distutils-r1 linux-info
+
+ISO="ISO-1.tar.gz"
+
+if [[ ${PV} == *9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/sergiotarxz/grss.git"
+	SRC_URI="https://dev.gentoo.org/~blueness/${PN}/${ISO}"
+	inherit git-r3
+else
+	SRC_URI="https://github.com/sergiotarxz/grss/archive/refs/tags/sergiotarxz-v${PV}.tar.gz -> $PN-$PV.tar.gz
+	https://dev.gentoo.org/~blueness/${PN}/${ISO}"
+	KEYWORDS="amd64 arm arm64 x86"
+fi
+
+S="${WORKDIR}/grss-sergiotarxz-v$PV"
+
+DESCRIPTION="Suite to build Gentoo Reference Systems"
+HOMEPAGE="https://dev.gentoo.org/~blueness/grs"
+
+LICENSE="GPL-2"
+SLOT="0"
+IUSE="server"
+
+DEPEND=""
+RDEPEND="
+	sys-apps/portage
+	server? (
+		app-arch/tar[xattr]
+		app-cdr/cdrtools
+		app-crypt/md5deep
+		dev-libs/libcgroup
+		dev-vcs/git
+		net-misc/rsync
+		sys-fs/squashfs-tools
+		|| (
+			sys-kernel/genkernel
+			sys-kernel/genkernel-next
+		)
+	)"
+
+pkg_setup() {
+	if use server; then
+		local CONFIG_CHECK="~CGROUPS"
+		local ERROR_CGROUPS="WARNING: grsrun requires CONFIG_CGROUPS enabled in the kernel."
+		linux-info_pkg_setup
+	fi
+}
+
+src_install() {
+	distutils-r1_src_install
+	echo "CONFIG_PROTECT=\"/etc/grs/systems.conf\"" > "${T}"/20grs
+	doenvd "${T}"/20grs
+	if use server; then
+		mkdir "${D}"/usr/share/${PN}
+		cp "${DISTDIR}"/${ISO} "${D}"/usr/share/${PN}
+	fi
+}