Added github actions.

.github/workflows/gcc.yml

@@ -0,0 +1,31 @@
+name: GCC
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Dependencies
+        run: sudo apt update && sudo apt install -y gfortran
+
+      - name: Install fpm
+        uses: fortran-lang/setup-fpm@v5
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run Tests
+        run: fpm test --flag "-g -fbacktrace -O3"