Whilst both .gp5 and .gp3 files originate from Guitar Pro program, it it doesn't seem possibly to just re-save one to another using the program or any other similar music software. Such gp5 to gp3 conversion is not doable because Guitar Pro formats lacks backward compatibility.
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
If you find entry that you feel is flagged as bad wrongly, please tell us in the discussion below with as much as information as possible so we can fix it.
