diff --git a/var/spack/repos/builtin/packages/gridlab-d/package.py b/var/spack/repos/builtin/packages/gridlab-d/package.py
new file mode 100644
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+++ b/var/spack/repos/builtin/packages/gridlab-d/package.py
@@ -0,0 +1,59 @@
+# Copyright 2013-2020 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 import *
+
+
+class GridlabD(AutotoolsPackage):
+    """
+    Autotools package for Gridlab-D, a new power distribution system simulation
+    and analysis tool that provides valuable information to users who design
+    and operate distribution systems, and to utilities that wish to take
+    advantage of the latest energy technologies. Gridlab-D is a flexible
+    simulation environment that can be integrated with a variety of third-party
+    data management and analysis tools.
+    """
+
+    homepage = "https://www.gridlabd.org/"
+    git      = "https://github.com/gridlab-d/gridlab-d"
+
+    maintainers = ['0t1s1', 'yee29', 'afisher1']
+
+    # Using only develop as other branches and releases did not build properly.
+    version('develop', branch='develop')
+
+    variant("mysql",
+            default=False,
+            description="Enable MySQL support for Gridlab-D.")
+    variant('helics',
+            default=False,
+            description='Enable Helics support for Gridlab-D.')
+
+    # Add dependencies.
+    depends_on('autoconf', type='build')
+    depends_on('automake', type='build')
+    depends_on('libtool', type='build')
+    depends_on('m4', type='build')
+    depends_on("xerces-c")
+    depends_on("superlu-mt")
+    depends_on('helics', when='+helics')
+
+    def configure_args(self):
+        args = []
+
+        if '+helics' in self.spec:
+            # Taken from
+            # https://github.com/GMLC-TDC/HELICS-Tutorial/tree/master/setup
+            args.append('--with-helics=' + self.spec['helics'].prefix)
+            args.append('CFLAGS=-g -O0 -w')
+            args.append('CXXFLAGS=-g -O0 -w -std=c++14')
+            args.append('LDFLAGS=-g -O0 -w')
+
+        return args
+
+    def setup_run_environment(self, env):
+        # Need to add GLPATH otherwise Gridlab-D will not run.
+        env.set('GLPATH', join_path(self.prefix, 'lib', 'gridlabd'))
+        env.prepend_path('GLPATH', join_path(self.prefix, 'share', 'gridlabd'))