diff --git a/esmvalcore/cmor/_fixes/nemo/gc3p1.py b/esmvalcore/cmor/_fixes/nemo/gc3p1.py
new file mode 100644
index 0000000000..643b7d3492
--- /dev/null
+++ b/esmvalcore/cmor/_fixes/nemo/gc3p1.py
@@ -0,0 +1,21 @@
+"""Fixes for GC3.1 data"""
+
+from esmvalcore.cmor.fix import Fix
+from iris.util import promote_aux_coord_to_dim_coord
+
+
+class AllVars(Fix):
+    """"""
+
+    def fix_metadata(self, cubes):
+        """"""
+        # Replace time_counter with time_centered/time_instant
+        for cube in cubes:
+            for coordinate in cube.coords(dim_coords=True):
+                if coordinate.var_name == 'time_counter':
+                    cube.remove_coord(coordinate)
+                    promote_aux_coord_to_dim_coord(cube, 'time')
+                    cube.coord('time').var_name = 'time'
+                    break
+
+        return cubes
diff --git a/esmvalcore/cmor/_fixes/nemo/gc5.py b/esmvalcore/cmor/_fixes/nemo/gc5.py
new file mode 100644
index 0000000000..df770296b9
--- /dev/null
+++ b/esmvalcore/cmor/_fixes/nemo/gc5.py
@@ -0,0 +1,26 @@
+"""Fixes for GC5 data"""
+
+from esmvalcore.cmor.fix import Fix
+from iris.util import promote_aux_coord_to_dim_coord
+
+
+class AllVars(Fix):
+    """"""
+
+    def fix_metadata(self, cubes):
+        """"""
+        # Correct variable name
+        for cube in cubes:
+            if cube.var_name.endswith('_con'):
+                cube.var_name = cube.var_name[:-4]
+
+            for coordinate in cube.coords(dim_coords=True):
+                if coordinate.var_name == 'time_counter':
+                    cube.remove_coord(coordinate)
+                    promote_aux_coord_to_dim_coord(cube, 'time')
+                    cube.coord('time').var_name = 'time'
+                    break
+
+        return cubes
+
+#check with emma about adding in the fix