diff --git a/Generic_Routing_Encapsulation_CNL113789.tpd b/Generic_Routing_Encapsulation_CNL113789.tpd
new file mode 100644
index 0000000..8f3e178
--- /dev/null
+++ b/Generic_Routing_Encapsulation_CNL113789.tpd
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<TITAN_Project_File_Information version="1.0">
+  <ProjectName>Generic_Routing_Encapsulation_CNL113789</ProjectName>
+  <ReferencedProjects>
+    <ReferencedProject name="ProtocolModules_Common" projectLocationURI="../COMMON/ProtocolModules_Common.tpd"/>
+  </ReferencedProjects>
+  <Files>
+    <FileResource projectRelativePath="GRE_Types.ttcn" relativeURI="src/GRE_Types.ttcn"/>
+  </Files>
+  <ActiveConfiguration>Default</ActiveConfiguration>
+  <Configurations>
+    <Configuration name="Default">
+      <ProjectProperties>
+        <MakefileSettings>
+          <generateInternalMakefile>true</generateInternalMakefile>
+          <GNUMake>true</GNUMake>
+          <incrementalDependencyRefresh>true</incrementalDependencyRefresh>
+          <targetExecutable>bin/Generic_Routing_Encapsulation_CNL113789</targetExecutable>
+          <buildLevel>Level 3 - Creating object files with dependency update</buildLevel>
+        </MakefileSettings>
+        <LocalBuildSettings>
+          <workingDirectory>bin</workingDirectory>
+        </LocalBuildSettings>
+      </ProjectProperties>
+    </Configuration>
+  </Configurations>
+</TITAN_Project_File_Information>
\ No newline at end of file
diff --git a/src/GRE_ProtocolModule.grp b/src/GRE_ProtocolModule.grp
new file mode 100644
index 0000000..7addd63
--- /dev/null
+++ b/src/GRE_ProtocolModule.grp
@@ -0,0 +1,6 @@
+<!DOCTYPE TITAN_GUI_FileGroup_file>
+<FileGroup TITAN_version="3.2.pl0" >
+    <File_Group name="GRE_ProtocolModule.grp" >
+        <File path="GRE_Types.ttcn" />
+    </File_Group>
+</FileGroup>
diff --git a/src/GRE_Types.ttcn b/src/GRE_Types.ttcn
new file mode 100644
index 0000000..76c167f
--- /dev/null
+++ b/src/GRE_Types.ttcn
@@ -0,0 +1,69 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2000-2016 Ericsson Telecom AB
+//
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// which accompanies this distribution, and is available at
+// http://www.eclipse.org/legal/epl-v10.html
+///////////////////////////////////////////////////////////////////////////////
+//
+//  File:               GRE_Types.ttcn
+//  Rev:                R1B
+//  Prodnr:             CNL 113 789
+//  Updated:            2013-08-27
+//  Contact:            http://ttcn.ericsson.se
+//  Reference:			RFC 1701
+
+module GRE_Types{
+	
+	import from General_Types all;
+    
+    external function enc_GRE_PDU(in GRE_PDU pdu) return octetstring
+	with { extension "prototype(convert) encode(RAW)" }
+	
+	external function dec_GRE_PDU(in octetstring stream) return GRE_PDU
+	with { extension "prototype(convert) decode(RAW)" }
+    
+	type record Source_Route_Entry{
+	  OCT2	address_family,
+	  OCT1	sre_offset,
+	  INT1	sre_length,
+	  octetstring	routing_information
+	} with {
+  		variant (sre_length) "LENGTHTO(routing_information)"
+	}
+
+	type set of Source_Route_Entry SRE_List
+
+	type record GRE_Header{
+	  BIT1	checksum_present,
+	  BIT1	routing_present,
+	  BIT1	key_present,
+	  BIT1	sequence_nubmer_present,
+	  BIT1	strict_source_route,
+	  BIT3	recursion_control,
+	  BIT5	reserved,
+	  BIT3	version_number,
+	  OCT2	protcol_type,
+	  OCT2	checksum optional,
+	  OCT2	offset optional,
+	  OCT4	key optional,
+	  OCT4	sequence_number optional,
+	  SRE_List	routing optional
+	} with {
+	  variant (checksum) 	"PRESENCE(checksum_present='1'B,routing_present='1'B)"
+	  variant (offset) 		"PRESENCE(checksum_present='1'B,routing_present='1'B)"
+	  variant (routing) 	"PRESENCE(routing_present='1'B)"
+	  variant (key) 		"PRESENCE(key_present='1'B)"
+	  variant (sequence_number)	"PRESENCE(sequence_nubmer_present='1'B)"
+	}
+
+	type record GRE_PDU{
+  		GRE_Header	header,
+  		octetstring	payload
+	} with { variant ""}
+
+} with {encode "RAW"
+		extension "version R1B"
+}
\ No newline at end of file