diff --git a/projects/GKCore/GDModel/Providers/GEDZIP/GEDZIPProvider.cs b/projects/GKCore/GDModel/Providers/GEDZIP/GEDZIPProvider.cs
new file mode 100644
index 000000000..6e8265cca
--- /dev/null
+++ b/projects/GKCore/GDModel/Providers/GEDZIP/GEDZIPProvider.cs
@@ -0,0 +1,68 @@
+/*
+ *  "GEDKeeper", the personal genealogical database editor.
+ *  Copyright (C) 2009-2023 by Sergey V. Zhdanovskih.
+ *
+ *  This file is part of "GEDKeeper".
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System.IO;
+using System.Text;
+using GDModel.Providers.GEDCOM;
+using GKCore;
+
+namespace GDModel.Providers.GEDZIP
+{
+    /// <summary>
+    /// Processing the GEDZIP format is one part of the Genealogical Data Model (GDM).
+    /// </summary>
+    public class GEDZIPProvider : FileProvider
+    {
+        static GEDZIPProvider()
+        {
+            // Static initialization of the GEDCOMProvider is needed, 
+            // otherwise the standard tag identifiers are out of sync
+            SysUtils.DoNotInline(GEDCOMProvider.GEDCOMFormats);
+        }
+
+        public GEDZIPProvider(GDMTree tree) : base(tree)
+        {
+        }
+
+        public override string GetFilesFilter()
+        {
+            return "GEDZIP files (*.gdz,*.zip)|*.gdz,*.zip";
+        }
+
+        protected override Encoding GetDefaultEncoding()
+        {
+            return Encoding.UTF8;
+        }
+
+        protected override string DetectCharset(Stream inputStream, bool charsetDetection)
+        {
+            string streamCharset = null;
+            return streamCharset;
+        }
+
+        public override void LoadFromStreamExt(Stream fileStream, Stream inputStream, bool charsetDetection = false)
+        {
+        }
+
+        protected override void LoadFromReader(Stream fileStream, StreamReader reader, string streamCharset = null)
+        {
+        }
+    }
+}
diff --git a/projects/GKCore/GKCore.csproj b/projects/GKCore/GKCore.csproj
index 1e198a90b..2412f10a0 100644
--- a/projects/GKCore/GKCore.csproj
+++ b/projects/GKCore/GKCore.csproj
@@ -64,6 +64,7 @@
       <Link>GlobalSuppressions.cs</Link>
     </Compile>
     <Compile Include="AssemblyInfo.cs" />
+    <Compile Include="GDModel\Providers\GEDZIP\GEDZIPProvider.cs" />
     <Compile Include="GKCore\Design\Controls\IFilterControl.cs" />
     <Compile Include="GKCore\Design\Controls\ISplitter.cs" />
     <Compile Include="GKCore\Design\IForm.cs" />
diff --git a/projects/GKCore/GKCore/BaseContext.cs b/projects/GKCore/GKCore/BaseContext.cs
index 4b7d002ea..071653a04 100644
--- a/projects/GKCore/GKCore/BaseContext.cs
+++ b/projects/GKCore/GKCore/BaseContext.cs
@@ -31,6 +31,7 @@
 using GDModel.Providers.FamilyShow;
 using GDModel.Providers.GEDCOM;
 using GDModel.Providers.GedML;
+using GDModel.Providers.GEDZIP;
 using GKCore.Controllers;
 using GKCore.Cultures;
 using GKCore.Design;
@@ -1387,6 +1388,8 @@ public async Task<bool> FileLoad(string fileName, bool loadSecure, bool showProg
                     fileProvider = new GedMLProvider(fTree);
                 } else if (ext == ".familyx") {
                     fileProvider = new FamilyXProvider(fTree);
+                } else if (ext == ".gdz" || ext == ".zip") {
+                    fileProvider = new GEDZIPProvider(fTree);
                 } else {
                     // TODO: message?
                     return false;
diff --git a/projects/GKCore/GKCore/Controllers/BaseWinController.cs b/projects/GKCore/GKCore/Controllers/BaseWinController.cs
index 0616acc72..370690c50 100644
--- a/projects/GKCore/GKCore/Controllers/BaseWinController.cs
+++ b/projects/GKCore/GKCore/Controllers/BaseWinController.cs
@@ -20,6 +20,7 @@
 
 #define GEDML_SUPPORT
 #define FAMX_SUPPORT
+//#define GDZ_SUPPORT
 
 using System;
 using System.Collections.Generic;
@@ -157,6 +158,10 @@ private void PrepareLoadFile(out string homePath, out string filters)
 #if FAMX_SUPPORT
             filters += "|" + "Family.Show files (*.familyx)|*.familyx";
 #endif
+
+#if GDZ_SUPPORT
+            filters += "|" + "GEDZIP files (*.gdz,*.zip)|*.gdz,*.zip";
+#endif
         }
 
         public async Task LoadFileEx()