diff --git a/.github/workflows/spack-ci.yml b/.github/workflows/spack-ci.yml
new file mode 100644
index 000000000000..22ae2f17b98c
--- /dev/null
+++ b/.github/workflows/spack-ci.yml
@@ -0,0 +1,92 @@
+name: spack-ci-gcc
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Pip install mepo
+        run: |
+          python -m pip install --upgrade pip
+          pip install mepo
+
+      - name: Mepo clone
+        run: |
+          mepo clone
+
+      - name: Set up Spack
+        uses: spack/setup-spack@v2
+        with:
+          ref: develop      # Spack version (examples: develop, releases/v0.21)
+          color: true       # Force color output (SPACK_COLOR=always)
+          path: spack       # Where to clone Spack
+          buildcache: false # Do not use the spack buildcache
+
+      - name: Find compilers
+        shell: spack-bash {0}
+        run: |
+          spack compiler find
+
+      - name: Set default compiler and target
+        shell: spack-bash {0}
+        run: |
+          spack config add 'packages:all:compiler:[gcc@13.2.0]'
+          spack config add 'packages:all:require:target=x86_64_v3'
+
+      - name: Create Spack environment
+        shell: spack-bash {0}
+        run: |
+          spack env create spack-env
+          spack env activate spack-env
+
+      - name: Login
+        shell: spack-bash {0}
+        run: |
+          spack -e spack-env mirror add mapl-buildcache oci://ghcr.io/mathomp4/mapl-buildcache
+          spack -e spack-env mirror set --oci-username ${{ github.actor }} --oci-password "${{ secrets.BUILDCACHE_TOKEN }}" mapl-buildcache
+          spack -e spack-env mirror list
+          spack -e spack-env buildcache update-index mapl-buildcache
+          spack -e spack-env buildcache list --allarch
+
+      - name: Concretize
+        shell: spack-bash {0}
+        run: |
+          spack -e spack-env concretize
+
+      - name: Install
+        shell: spack-bash {0}
+        run: |
+          spack -e spack-env install --add --no-check-signature --use-buildcache only \
+            esmf gftl gftl-shared fargparse pflogger pfunit yafyaml ecbuild udunits
+
+      - name: Build with Cmake
+        shell: spack-bash {0}
+        run: |
+          spack env activate spack-env
+          spack load \
+            esmf gftl gftl-shared fargparse pflogger pfunit yafyaml ecbuild udunits
+          spack find --loaded
+          FC=gfortran-13 CC=gcc-13 CXX=g++-13
+          cmake -B build -S . -DCMAKE_INSTALL_PREFIX=$PWD/install -DCMAKE_BUILD_TYPE=Debug -DUSE_F2PY=OFF -DCMAKE_Fortran_COMPILER=${FC} -DCMAKE_C_COMPILER=${CC} -DCMAKE_CXX_COMPILER=${CXX}
+          cmake --build build -j 4
+          cmake --install build
+          cd build
+          make -j4 tests
+
diff --git a/CHANGELOG.md b/CHANGELOG.md
index be9a58f54a58..f71d401525ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Allow update offsets of ±timestep in ExtData2G
+- Added CI build using spack
 - Minor revision (and generalization) of grid-def for GSI purposes
 
 ### Changed