DISPLAY - Only show GPS page when using GPS passthrough.

src/main/io/gps.c

@@ -984,6 +984,11 @@ gpsEnablePassthroughResult_e gpsEnablePassthrough(void)
     LED0_OFF;
     LED1_OFF;
 
+#ifdef DISPLAY
+    if (feature(FEATURE_DISPLAY)) {
+        displayShowFixedPage(PAGE_GPS);
+    }
+#endif
     char c;
     while(1) {
         if (serialTotalBytesWaiting(gpsPort)) {