diff --git a/science/Makefile b/science/Makefile
index dc49b761e53a..4599d8bd0242 100644
--- a/science/Makefile
+++ b/science/Makefile
@@ -51,6 +51,7 @@
     SUBDIR += fvcom-mpi
     SUBDIR += fvm
     SUBDIR += gchemutils
+    SUBDIR += gdma
     SUBDIR += getdp
     SUBDIR += ghemical
     SUBDIR += ghmm
diff --git a/science/gdma/Makefile b/science/gdma/Makefile
new file mode 100644
index 000000000000..3d45661d43cd
--- /dev/null
+++ b/science/gdma/Makefile
@@ -0,0 +1,23 @@
+# $FreeBSD$
+
+PORTNAME=	gdma
+DISTVERSIONPREFIX=	v
+DISTVERSION=	2.2.6
+CATEGORIES=	science
+
+MAINTAINER=	yuri@FreeBSD.org
+COMMENT=	Anthony Stone's Gaussian Distributed Multipole Analysis
+
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/LICENSE
+
+USES=		cmake:outsource fortran
+USE_GITHUB=	yes
+GH_ACCOUNT=	psi4
+USE_LDCONFIG=	yes
+
+CMAKE_ARGS=	-DBUILD_SHARED_LIBS:BOOL=ON \
+		-DENABLE_XHOST:BOOL=OFF \
+		-DENABLE_OPENMP:BOOL=ON
+
+.include <bsd.port.mk>
diff --git a/science/gdma/distinfo b/science/gdma/distinfo
new file mode 100644
index 000000000000..d9e22e9b14e9
--- /dev/null
+++ b/science/gdma/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1510782499
+SHA256 (psi4-gdma-v2.2.6_GH0.tar.gz) = 7744b9626a1ce499f15be9d7d0317f3b3cb126a8451f0067319e1d48a0301b72
+SIZE (psi4-gdma-v2.2.6_GH0.tar.gz) = 106606
diff --git a/science/gdma/pkg-descr b/science/gdma/pkg-descr
new file mode 100644
index 000000000000..261672f1ac19
--- /dev/null
+++ b/science/gdma/pkg-descr
@@ -0,0 +1,6 @@
+GDMA has been in the ab initio quantum chemistry package Psi4.
+
+It is written by Prof. Anthony J. Stone of Cambridge University
+in fortran.
+
+WWW: https://github.com/psi4/gdma
diff --git a/science/gdma/pkg-plist b/science/gdma/pkg-plist
new file mode 100644
index 000000000000..d543a7e62be6
--- /dev/null
+++ b/science/gdma/pkg-plist
@@ -0,0 +1,6 @@
+include/GDMA/GDMA_MANGLE.h
+lib/libgdma.so
+share/cmake/gdma/gdmaConfig.cmake
+share/cmake/gdma/gdmaConfigVersion.cmake
+share/cmake/gdma/gdmaTargets-%%CMAKE_BUILD_TYPE%%.cmake
+share/cmake/gdma/gdmaTargets.cmake