diff --git a/radio.c b/radio.c
index 933eff9..5730130 100644
--- a/radio.c
+++ b/radio.c
@@ -47,7 +47,8 @@ static struct {
     { "ZD3688",     &radio_d900 },      // Zastone D900
     { "TP660",      &radio_dp880 },     // Zastone DP880
     { "ZN><:",      &radio_rt27d },     // Radtel RT-27D
-    { "BF-5R",      &radio_rd5r },      // Baofengl RD-5R
+    { "BF-5R",      &radio_rd5r },      // Baofeng RD-5R
+    { "MD-760P",    &radio_gd77 },      // Radioddity GD-77
     { 0, 0 }
 };
 
@@ -168,8 +169,14 @@ void radio_read_image(const char *filename)
 {
     FILE *img;
     struct stat st;
+    char ident[8];
 
     fprintf(stderr, "Read codeplug from file '%s'.\n", filename);
+    img = fopen(filename, "rb");
+    if (! img) {
+        perror(filename);
+        exit(-1);
+    }
 
     // Guess device type by file size.
     if (stat(filename, &st) < 0) {
@@ -186,7 +193,20 @@ void radio_read_image(const char *filename)
         device = &radio_md380;
         break;
     case 131072:
-        device = &radio_rd5r;
+        if (fread(ident, 1, 8, img) != 8) {
+            fprintf(stderr, "%s: Cannot read header.\n", filename);
+            exit(-1);
+        }
+        fseek(img, 0, SEEK_SET);
+        if (memcmp(ident, "BF-5R", 5) == 0) {
+            device = &radio_rd5r;
+        } else if (memcmp(ident, "MD-760P", 7) == 0) {
+            device = &radio_gd77;
+        } else {
+            fprintf(stderr, "%s: Unrecognized header '%.6s'\n",
+                filename, ident);
+            exit(-1);
+        }
         break;
     default:
         fprintf(stderr, "%s: Unrecognized file size %u bytes.\n",
@@ -194,11 +214,6 @@ void radio_read_image(const char *filename)
         exit(-1);
     }
 
-    img = fopen(filename, "rb");
-    if (! img) {
-        perror(filename);
-        exit(-1);
-    }
     device->read_image(device, img);
     fclose(img);
 }
diff --git a/radio.h b/radio.h
index 1276c52..95eb5f4 100644
--- a/radio.h
+++ b/radio.h
@@ -123,6 +123,7 @@ extern radio_device_t radio_d900;       // Zastone D900
 extern radio_device_t radio_dp880;      // Zastone DP880
 extern radio_device_t radio_rt27d;      // Radtel RT-27D
 extern radio_device_t radio_rd5r;       // Baofeng RD-5R
+extern radio_device_t radio_gd77;       // Radioddity GD-77
 
 //
 // Radio: memory contents.
diff --git a/rd5r.c b/rd5r.c
index 9caba60..b036d52 100644
--- a/rd5r.c
+++ b/rd5r.c
@@ -363,7 +363,7 @@ static void rd5r_print_version(radio_device_t *radio, FILE *out)
 //
 // Read memory image from the device.
 //
-static void rd5r_download(radio_device_t *radio)
+static void download(radio_device_t *radio)
 {
     int bno;
 
@@ -383,15 +383,34 @@ static void rd5r_download(radio_device_t *radio)
     }
     //hid_read_finish();
 
-    // Add header.
+    // Clear header and footer.
     memset(&radio_mem[0], 0xff, 128);
-    memcpy(&radio_mem[0], "BF-5R", 5);
-
-    // Clear footer.
     memset(&radio_mem[966*128], 0xff, MEMSZ - 966*128);
     memset(&radio_mem[248*128], 0xff, 8*128);
 }
 
+//
+// Baofeng RD-5R: read memory image.
+//
+static void rd5r_download(radio_device_t *radio)
+{
+    download(radio);
+
+    // Add header.
+    memcpy(&radio_mem[0], "BF-5R", 5);
+}
+
+//
+// Radioddity GD-77: read memory image.
+//
+static void gd77_download(radio_device_t *radio)
+{
+    download(radio);
+
+    // Add header.
+    memcpy(&radio_mem[0], "MD-760P", 7);
+}
+
 //
 // Write memory image to the device.
 //
@@ -424,6 +443,14 @@ static int rd5r_is_compatible(radio_device_t *radio)
     return strncmp("BF-5R", (char*)&radio_mem[0], 5) == 0;
 }
 
+//
+// Check whether the memory image is compatible with this device.
+//
+static int gd77_is_compatible(radio_device_t *radio)
+{
+    return strncmp("MD-760P", (char*)&radio_mem[0], 7) == 0;
+}
+
 //
 // Set name for a given zone.
 //
@@ -2294,3 +2321,22 @@ radio_device_t radio_rd5r = {
     rd5r_parse_row,
     rd5r_update_timestamp,
 };
+
+//
+// Radioddity GD-77
+//
+radio_device_t radio_gd77 = {
+    "Radioddity GD-77",
+    gd77_download,
+    rd5r_upload,
+    gd77_is_compatible,
+    rd5r_read_image,
+    rd5r_save_image,
+    rd5r_print_version,
+    rd5r_print_config,
+    rd5r_verify_config,
+    rd5r_parse_parameter,
+    rd5r_parse_header,
+    rd5r_parse_row,
+    rd5r_update_timestamp,
+};