diff --git a/Location.cpp b/Location.cpp
new file mode 100644
index 0000000..50aee31
--- /dev/null
+++ b/Location.cpp
@@ -0,0 +1,117 @@
+/*
+ *   Copyright (C) 2020 by Thomas Early N7TAE
+ *
+ *   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 2 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, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <string>
+#include <regex>
+#include <cmath>
+#include <iostream>
+
+#include "Utilities.h"
+#include "Location.h"
+
+CLocation::CLocation()
+{
+	crc = std::regex("^.*([0-9]{2})([0-9]{2}\\.[0-9]{2,})([NS])/([0-9]{3})([0-9]{2}\\.[0-9]{1,})([WE])\\[.*$", std::regex::extended);
+	rmc = std::regex("^.*,([0-9]{2})([0-9]{2}\\.[0-9]{2,}),([NS]),([0-9]{3})([0-9]{2}\\.[0-9]{1,}),([WE]),.*$", std::regex::extended);
+}
+
+// returns true on success
+bool CLocation::Parse(const char *instr)
+{
+	std::string s(instr);
+	std::cmatch cm;
+	trim(s);
+
+	if (0 == s.find("$$CRC")) {
+		std::regex_match(s.c_str(), cm, crc, std::regex_constants::match_default);
+	} else if ((0 == s.find("$GPGGA")) || (0 == s.find("$GPRMC"))) {
+		std::regex_match(s.c_str(), cm, rmc, std::regex_constants::match_default);
+	} else {
+		if ('$' == s.at(0))
+			std::cerr << "can't parse GPS string: " << s << std::endl;
+		return false;
+	}
+
+	auto size = cm.size();
+	if (size != 7) {
+		std::cerr << "Bad CRC Match for " << s << ":";
+		for (unsigned i=0; i<size; i++)
+			std::cerr << " [" << cm[i] << "]";
+		std::cerr << std::endl;
+		return false;
+	}
+
+	double deg = stod(cm[1]);
+	if (90.0 < deg) {
+		std::cout << "Latitude degree " << deg << " is out of range" << std::endl;
+		return false;
+	}
+
+	double min = stod(cm[2]);
+	if (60.0 < min) {
+		std::cout << "Latitude minutes " << min << " is out of range" << std::endl;
+		return false;
+	}
+
+	latitude = deg + min / 60.0;
+	if ('S' == cm[3])
+		latitude = 0 - latitude;
+
+	deg = stod(cm[4]);
+	if (180.0 < deg) {
+		std::cout << "Longitude degree " << deg << " is out of range" << std::endl;
+		return false;
+	}
+
+	min = stod(cm[5]);
+	if (60.0 < min) {
+		std::cout << "Longitude minutes " << min << " is out of range" << std::endl;
+		return false;
+	}
+
+	longitude = deg + min / 60.0;
+	if ('W' == cm[6])
+		longitude = 0 - longitude;
+
+	double lat = latitude + 90.0;
+	double lon = longitude + 180.0;
+	maidenhead[0] = 'A' +  (int(lon) / 20);
+	maidenhead[1] = 'A' +  (int(lat) / 10);
+	maidenhead[2] = '0' + ((int(lon) % 20) / 2);
+	maidenhead[3] = '0' +  (int(lat) % 10);
+	maidenhead[4] = 'a' +  (int(lon * 12.0) % 24);
+	maidenhead[5] = 'a' +  (int(lat * 24.0) % 24);
+	maidenhead[6] = '\0';
+
+	return true;
+}
+
+double CLocation::Latitude() const
+{
+	return latitude;
+}
+
+double CLocation::Longitude() const
+{
+	return longitude;
+}
+
+const char* CLocation::MaidenHead() const
+{
+	return maidenhead;
+}
diff --git a/Location.h b/Location.h
new file mode 100644
index 0000000..483bbed
--- /dev/null
+++ b/Location.h
@@ -0,0 +1,33 @@
+#pragma once
+
+/*
+ *   Copyright (C) 2020 by Thomas Early N7TAE
+ *
+ *   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 2 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, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+class CLocation
+{
+public:
+	CLocation();
+	bool Parse(const char *instr);
+	double Latitude() const;
+	double Longitude() const;
+	const char* MaidenHead() const;
+private:
+	char maidenhead[7];
+	double latitude, longitude;
+	std::regex crc, rmc;
+};
diff --git a/Makefile b/Makefile
index 71f00f6..d34ead5 100644
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,7 @@ dvrptr : qndvrptr
 itap   : qnitap
 modem  : qnmodem
 
-qngateway : QnetGateway.o KRBase.o aprs.o UnixDgramSocket.o UnixPacketSock.o TCPReaderWriterClient.o QnetConfigure.o QnetDB.o CacheManager.o DStarDecode.o $(IRCOBJS)
+qngateway : QnetGateway.o KRBase.o aprs.o UnixDgramSocket.o UnixPacketSock.o TCPReaderWriterClient.o QnetConfigure.o QnetDB.o CacheManager.o DStarDecode.o Location.o $(IRCOBJS)
 	g++ -o $@ $^ $(LDFLAGS) -l sqlite3 -pthread
 
 qnlink : QnetLink.o KRBase.o DPlusAuthenticator.o TCPReaderWriterClient.o UnixPacketSock.o UDPSocket.o QnetConfigure.o QnetDB.o
diff --git a/QnetDB.cpp b/QnetDB.cpp
index 4061cf3..b942a86 100644
--- a/QnetDB.cpp
+++ b/QnetDB.cpp
@@ -38,6 +38,10 @@ bool CQnetDB::Init()
 	std::string sql("CREATE TABLE IF NOT EXISTS LHEARD("
 						"callsign	TEXT PRIMARY KEY, "
 						"sfx		TEXT, "
+						"message    TEXT, "
+						"maidenhead TEXT, "
+						"latitude   REAL, "
+						"longitude  REAL, "
 						"module		TEXT, "
 						"reflector	TEXT, "
 						"lasttime	INT NOT NULL"
@@ -102,6 +106,52 @@ bool CQnetDB::UpdateLH(const char *callsign, const char *sfx, const char module,
 	return false;
 }
 
+bool CQnetDB::UpdatePosition(const char *callsign, const char *maidenhead, double latitude, double longitude)
+{
+	if (NULL == db)
+		return false;
+	std::string sql("INSERT OR REPLACE INTO LHEARD (callsign,maidenhead,latitude,longitude,lasttime) VALUES('");
+	sql.append(callsign);
+	sql.append("','");
+	sql.append(maidenhead);
+	sql.append("',");
+	sql.append(std::to_string(latitude));
+	sql.append(",");
+	sql.append(std::to_string(longitude));
+	sql.append(",");
+	sql.append("strftime('%s','now'));");
+
+	char *eMsg;
+	if (SQLITE_OK != sqlite3_exec(db, sql.c_str(), NULL, 0, &eMsg)) {
+		fprintf(stderr, "CQnetDB::UpdatePosition error: %s", eMsg);
+		sqlite3_free(eMsg);
+		return true;
+	}
+
+	return false;
+}
+
+bool CQnetDB::UpdateMessage(const char *callsign, const char *message)
+{
+	if (NULL == db)
+		return false;
+	std::string sql("INSERT OR REPLACE INTO LHEARD (callsign,maidenhead,latitude,longitude,lasttime) VALUES('");
+	sql.append(callsign);
+	sql.append("','");
+	sql.append(message);
+	sql.append("',");
+	sql.append("strftime('%s','now'));");
+
+	char *eMsg;
+	if (SQLITE_OK != sqlite3_exec(db, sql.c_str(), NULL, 0, &eMsg)) {
+		fprintf(stderr, "CQnetDB::UpdateMessage error: %s", eMsg);
+		sqlite3_free(eMsg);
+		return true;
+	}
+
+	return false;
+}
+
 bool CQnetDB::UpdateLS(const char *address, const char from_mod, const char *to_callsign, const char to_mod, time_t linked_time)
 {
 	if (NULL == db)
diff --git a/QnetDB.h b/QnetDB.h
index 4c66288..5e5e080 100644
--- a/QnetDB.h
+++ b/QnetDB.h
@@ -55,6 +55,8 @@ public:
 	~CQnetDB() { if (db) sqlite3_close(db); }
 	bool Open(const char *name);
 	bool UpdateLH(const char *callsign, const char *sfx, const char module, const char *reflector);
+	bool UpdateMessage(const char *callsign, const char *message);
+	bool UpdatePosition(const char *callsign, const char *maidenhead, double latitude, double longitude);
 	bool UpdateLS(const char *address, const char from_mod, const char *to_callsign, const char to_mod, time_t connect_time);
 	bool UpdateGW(CHostQueue &);
 	bool DeleteLS(const char *address);
diff --git a/QnetGateway.cpp b/QnetGateway.cpp
index b39a513..ce871d1 100644
--- a/QnetGateway.cpp
+++ b/QnetGateway.cpp
@@ -54,7 +54,7 @@
 #define CFG_DIR "/usr/local/etc"
 #endif
 
-const std::string GW_VERSION("QnetGateway-611");
+const std::string GW_VERSION("QnetGateway-612");
 
 int CQnetGateway::FindIndex(const int i) const
 {
@@ -1006,7 +1006,14 @@ void CQnetGateway::ProcessIncomingSD(const SDSVT &dsvt)
 					memcpy(sd.gps+sd.ig, c+1, size);
 					if (c[1]=='\r' || c[2]=='\r') {
 						sd.gps[sd.ig + ((c[1] == '\r') ? 0 : 1)] = '\0';
-						printf("GPS[%d] String='%s'\n", i, sd.gps);
+						if (i < 3) {
+							if (showLastHeard && gps.Parse((const char *)&sd.ig)) {
+								char call[CALL_SIZE+1];
+								memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
+								call[CALL_SIZE] = '\0';
+								qnDB.UpdatePosition(call, gps.MaidenHead(), gps.Longitude(), gps.Longitude());
+							}
+						}
 						sd.ig = sd.size = 0;
 					} else {
 						sd.ig += size;
@@ -1030,18 +1037,38 @@ void CQnetGateway::ProcessIncomingSD(const SDSVT &dsvt)
 				sd.first = false;
 				break;
 			case 0x50U:	// header
-				if (sd.size + sd.ih < 42) {
-					memcpy(sd.header+sd.ih, c+1, size);
-					sd.ih += size;
-					if (sd.ih == 41) {
-						memcpy(sdheader.hdr.flag, sd.header, 39);
-						calcPFCS(sdheader.title, 56);
-						printf("Header: flags=%x:%x:%x r1=%8.8s r2=%8.8s ur=%8.8s my=%8.8s nm=%4.4s %02x%02x?=%02x%02x\n", sdheader.hdr.flag[0], sdheader.hdr.flag[1], sdheader.hdr.flag[2], sdheader.hdr.rpt1, sdheader.hdr.rpt2, sdheader.hdr.urcall, sdheader.hdr.mycall, sdheader.hdr.sfx, sd.header[39], sd.header[40], sdheader.hdr.pfcs[0], sdheader.hdr.pfcs[1]);
+				if (3 == i) {
+					if (sd.size + sd.ih < 42) {
+						memcpy(sd.header+sd.ih, c+1, size);
+						sd.ih += size;
+						if (sd.ih == 41) {
+							memcpy(sdheader.hdr.flag, sd.header, 39);
+							calcPFCS(sdheader.title, 56);
+							if (0 == memcmp(sd.header+39, sdheader.hdr.pfcs, 2)) {
+								int mod = sdheader.hdr.rpt2[CALL_SIZE-1] - 'A';
+								if (mod >= 0 && mod < 3 && Rptr.mod[mod].defined) {
+									unsigned char call[CALL_SIZE];
+									memcpy(call, sdheader.hdr.rpt1, CALL_SIZE);
+									memcpy(sdheader.hdr.rpt2, sdheader.hdr.rpt1, CALL_SIZE);
+									memcpy(sdheader.hdr.rpt1, call, CALL_SIZE);
+									calcPFCS(sdheader.title, 56);
+									ToModem[mod].Write(sdheader.title, 56);
+									toRptr[mod].streamid = sdheader.streamid;
+									toRptr[mod].addr = fromDstar;
+									toRptr[mod].sequence = sdheader.ctrl;
+									time(&toRptr[mod].last_time);
+									if (LOG_QSO)
+										printf("SD Header: id=0x%04x flags=%x:%x:%x r1=%8.8s r2=%8.8s ur=%8.8s my=%8.8s nm=%4.4s\n", htons(sdheader.streamid), sdheader.hdr.flag[0], sdheader.hdr.flag[1], sdheader.hdr.flag[2], sdheader.hdr.rpt1, sdheader.hdr.rpt2, sdheader.hdr.urcall, sdheader.hdr.mycall, sdheader.hdr.sfx);
+									sd.ih = sd.size = 0;
+								} else {
+									fprintf(stderr, "Got a valid slow data header but module %d doesn't exist\n", mod);
+								}
+							}
+						}
+					} else {
+						//printf("Header overflow, message has %d bytes, trying to add %d more\n", sd.ih, sd.size);
 						sd.ih = sd.size = 0;
 					}
-				} else {
-					//printf("Header overflow, message has %d bytes, trying to add %d more\n", sd.ih, sd.size);
-					sd.ih = sd.size = 0;
 				}
 				sd.first = false;
 				break;
@@ -1063,7 +1090,14 @@ void CQnetGateway::ProcessIncomingSD(const SDSVT &dsvt)
 						sd.gps[sd.ig+1] = '\0';
 					else
 						sd.gps[sd.ig+2] = '\0';
-					printf("GPS[%d] string='%s'\n", i, sd.gps);
+					if (i < 3) {
+						if (showLastHeard && gps.Parse((const char *)&sd.ig)) {
+							char call[CALL_SIZE+1];
+							memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
+							call[CALL_SIZE] = '\0';
+							qnDB.UpdatePosition(call, gps.MaidenHead(), gps.Longitude(), gps.Longitude());
+						}
+					}
 					sd.ig = 0;
 				} else {
 					sd.ig += sd.size;
@@ -1075,12 +1109,17 @@ void CQnetGateway::ProcessIncomingSD(const SDSVT &dsvt)
 				sd.im += 3;
 				if (sd.im >= 20) {
 					sd.message[20] = '\0';
-					printf("Message[%d]='%s'\n", i, sd.message);
+					if (showLastHeard && (i < 3)) {
+						char call[CALL_SIZE+1];
+						memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
+						call[CALL_SIZE] = '\0';
+						qnDB.UpdateMessage(call, (const char *)&(sd.message));
+					}
 					sd.im = 0;
 				}
 				break;
 			case 0x50U:	// header
-				if (sd.size) {
+				if ((3 == i) && sd.size) {
 					memcpy(sd.header+sd.ih, c, 3);
 					sd.ih += 3;
 				}
@@ -2594,6 +2633,15 @@ bool CQnetGateway::Init(char *cfgfile)
 	memcpy(end_of_audio.title, "DSVT", 4U);
 	end_of_audio.id = end_of_audio.config = 0x20U;
 
+	// and the slow data header
+	memcpy(sdheader.title, "DSVT", 4);
+	sdheader.config = 0x10;
+	memset(sdheader.flaga, 0, 3);
+	sdheader.id = 0x10U;
+	sdheader.flagb[0] = 0;
+	sdheader.flagb[1] = sdheader.flagb[2] = 0x1U;
+	sdheader.ctrl = 0x80;
+
 	/* to remote systems */
 	for (i = 0; i < 3; i++) {
 		to_remote_g2[i].toDstar.Clear();
diff --git a/QnetGateway.h b/QnetGateway.h
index 829967a..7a36dbe 100644
--- a/QnetGateway.h
+++ b/QnetGateway.h
@@ -29,6 +29,7 @@
 #include "QnetDB.h"
 #include "DStarDecode.h"
 #include "KRBase.h"
+#include "Location.h"
 
 #define MAXHOSTNAMELEN 64
 #define CALL_SIZE 8
@@ -160,6 +161,8 @@ private:
 	CIRCDDB *ii[2];
 	// for handling APRS stuff
 	CAPRS *aprs;
+	// for parsign GPS slow data
+	CLocation gps;
 
 	// text coming from local repeater bands
 	SBANDTXT band_txt[3]; // 0=A, 1=B, 2=C