diff --git a/multi_user/bl_types/bl_object.py b/multi_user/bl_types/bl_object.py
index 02d464b..2661e0e 100644
--- a/multi_user/bl_types/bl_object.py
+++ b/multi_user/bl_types/bl_object.py
@@ -271,13 +271,35 @@ class BlObject(BlDatablock):
             return data
 
         # MODIFIERS
-        if hasattr(instance, 'modifiers'):
+        modifiers = getattr(instance,'modifiers', None )
+        if modifiers:
             dumper.include_filter = None
             dumper.depth = 1
             data["modifiers"] = {}
-            for index, modifier in enumerate(instance.modifiers):
+            for index, modifier in enumerate(modifiers):
                 data["modifiers"][modifier.name] = dumper.dump(modifier)
 
+        gp_modifiers = getattr(instance, 'grease_pencil_modifiers', None)
+
+        if gp_modifiers:
+            dumper.include_filter = None
+            dumper.depth = 1
+            gp_modifiers_data = data["grease_pencil_modifiers"] = {}
+
+            for index, modifier in enumerate(gp_modifiers):
+                gp_mod_data = gp_modifiers_data[modifier.name] = dict()
+                gp_mod_data.update(dumper.dump(modifier))
+
+                if hasattr(modifier, 'use_custom_curve') \
+                        and modifier.use_custom_curve:
+                    curve_dumper = Dumper()
+                    curve_dumper.depth = 5
+                    curve_dumper.include_filter = [
+                        'curves',
+                        'points',
+                        'location']
+                    gp_mod_data['curve'] = curve_dumper.dump(modifier.curve)
+
         # CONSTRAINTS
         if hasattr(instance, 'constraints'):
             dumper.depth = 3
diff --git a/multi_user/bl_types/dump_anything.py b/multi_user/bl_types/dump_anything.py
index 3b6e255..50b7022 100644
--- a/multi_user/bl_types/dump_anything.py
+++ b/multi_user/bl_types/dump_anything.py
@@ -506,12 +506,14 @@ class Loader:
             T.ColorRampElement: (CONSTRUCTOR_NEW, ["position"]),
             T.ParticleSettingsTextureSlot: (CONSTRUCTOR_ADD, []),
             T.Modifier: (CONSTRUCTOR_NEW, ["name", "type"]),
+            T.GpencilModifier: (CONSTRUCTOR_NEW, ["name", "type"]),
             T.Constraint: (CONSTRUCTOR_NEW, ["type"]),
         }
 
         destructors = {
             T.ColorRampElement: DESTRUCTOR_REMOVE,
             T.Modifier: DESTRUCTOR_CLEAR,
+            T.GpencilModifier: DESTRUCTOR_CLEAR,
             T.Constraint: CONSTRUCTOR_NEW,
         }
         element_type = element.bl_rna_property.fixed_type
@@ -574,6 +576,7 @@ class Loader:
                     dst_curve.points[int(point_idx)].location = pos
                 else:
                     dst_curve.points.new(pos[0], pos[1])
+        curves.update()
 
     def _load_pointer(self, instance, dump):
         rna_property_type = instance.bl_rna_property.fixed_type
diff --git a/tests/test_bl_types/test_object.py b/tests/test_bl_types/test_object.py
index 7339e03..f73b848 100644
--- a/tests/test_bl_types/test_object.py
+++ b/tests/test_bl_types/test_object.py
@@ -23,7 +23,14 @@ MOFIFIERS_TYPES = [
     'CORRECTIVE_SMOOTH', 'LAPLACIANSMOOTH', 'SURFACE_DEFORM',
     'WARP', 'WAVE', 'CLOTH', 'COLLISION', 'DYNAMIC_PAINT',
     'EXPLODE', 'FLUID', 'OCEAN', 'PARTICLE_INSTANCE',
-    'SOFT_BODY', 'SURFACE'] 
+    'SOFT_BODY', 'SURFACE']
+
+GP_MODIFIERS_TYPE = [
+    'GP_ARRAY', 'GP_BUILD', 'GP_MIRROR', 'GP_MULTIPLY',
+    'GP_SIMPLIFY', 'GP_SUBDIV', 'GP_ARMATURE',
+    'GP_HOOK', 'GP_LATTICE', 'GP_NOISE', 'GP_OFFSET',
+    'GP_SMOOTH', 'GP_THICK', 'GP_TIME', 'GP_COLOR',
+    'GP_OPACITY', 'GP_TEXTURE', 'GP_TINT']
 
 CONSTRAINTS_TYPES = [
     'CAMERA_SOLVER', 'FOLLOW_TRACK', 'OBJECT_SOLVER', 'COPY_LOCATION',
@@ -33,17 +40,21 @@ CONSTRAINTS_TYPES = [
     'LOCKED_TRACK', 'STRETCH_TO', 'TRACK_TO', 'ACTION',
     'ARMATURE', 'CHILD_OF', 'FLOOR', 'FOLLOW_PATH', 'PIVOT', 'SHRINKWRAP']
 
-#temporary disabled 'SPLINE_IK' until its fixed
+# temporary disabled 'SPLINE_IK' until its fixed
+
 
 def test_object(clear_blend):
     bpy.ops.mesh.primitive_cube_add(
         enter_editmode=False, align='WORLD', location=(0, 0, 0))
 
     datablock = bpy.data.objects[0]
-    
+
     # Add modifiers
     for mod_type in MOFIFIERS_TYPES:
-        datablock.modifiers.new(mod_type,mod_type)
+        datablock.modifiers.new(mod_type, mod_type)
+
+    for mod_type in GP_MODIFIERS_TYPE:
+        datablock.grease_pencil_modifiers.new(mod_type,mod_type)
 
     # Add constraints
     for const_type in CONSTRAINTS_TYPES:
@@ -54,7 +65,6 @@ def test_object(clear_blend):
     datablock.shape_key_add(name='shape')
     datablock.shape_key_add(name='shape2')
 
-
     implementation = BlObject()
     expected = implementation._dump(datablock)
     bpy.data.objects.remove(datablock)