diff --git a/var/spack/repos/builtin/packages/mepo/package.py b/var/spack/repos/builtin/packages/mepo/package.py
new file mode 100644
index 00000000000000..b6baf14c404ac8
--- /dev/null
+++ b/var/spack/repos/builtin/packages/mepo/package.py
@@ -0,0 +1,26 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Mepo(Package):
+    """Tool to manage (m)ultiple git r(epo)sitories"""
+
+    homepage = "https://github.com/GEOS-ESM/mepo"
+    url = "https://github.com/GEOS-ESM/mepo/archive/refs/tags/v1.51.1.tar.gz"
+
+    maintainers("mathomp4", "climbfuji")
+
+    version("1.51.1", sha256="543c1e7487afb2d62e5e8c8a2f69a85af1b1951f588f3dfc7471763e90847360")
+
+    depends_on("python", type="run")
+    depends_on("py-pyyaml@5.4:", type="run")
+
+    def install(self, spec, prefix):
+        mkdirp(prefix.bin)
+        install_tree(".", prefix)
+        # Symlink mepo to bin directory
+        symlink(join_path(prefix, "mepo"), join_path(prefix.bin, "mepo"))
diff --git a/var/spack/repos/jcsda-emc-bundles/packages/geos-gcm-env/package.py b/var/spack/repos/jcsda-emc-bundles/packages/geos-gcm-env/package.py
new file mode 100644
index 00000000000000..273596733ae14a
--- /dev/null
+++ b/var/spack/repos/jcsda-emc-bundles/packages/geos-gcm-env/package.py
@@ -0,0 +1,33 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class GeosGcmEnv(BundlePackage):
+    """Development environment for GEOS-GCM"""
+
+    homepage = "https://gmao.gsfc.nasa.gov/GEOS_systems"
+    git = "https://github.com/GEOS-ESM/GEOSgcm"
+
+    maintainers("climbfuji", "mathomp4", "danholdaway")
+
+    # Current version
+    version("1.0.0")
+
+    depends_on("base-env", type="run")
+    depends_on("blas", type="run")
+    depends_on("mepo", type="run")
+    depends_on("esmf", type="run")
+    # mapl is built as part of GEOS, don't load;
+    # needs external gftl-shared/fargparse/pflogger
+    # depends_on("mapl", type="run")
+    depends_on("gftl-shared", type="run")
+    depends_on("fargparse", type="run")
+    depends_on("pflogger", type="run")
+    #
+    depends_on("py-numpy", type="run")
+
+    # There is no need for install() since there is no code.