I just installed Sygic GPS and was annoyed to see the audio files now appear in my Music or Media player! However I remember seeing the fix some time ago. The fix is easy, just make a text file in Windows with notepad and save it as all files, naming it .nomedia
Now if you want to block the GPS audio and images from showing up, place the .nomedia in the folder that you want blocked from mediaplayer.
Example: For Sygic GPS. On the mircosd /Drive and /Res folders place the .nomedia file there inside.
(If your real lazy I've attached the file for you to download below)
nomedia file to block mediaplayer searches.zip