I edited the code in Gallery2.php to let it function like the way I mean it.....
This is how it is now (last versions of galleryPro):

This is how it should be i.m.o:

So I abused

your code:
in Gallery2.php find:
// Top Rated
$result = $smcFunc['db_query']('', "
SELECT
id_picture, title,rating, (rating / totalratings ) AS ratingaverage
FROM {db_prefix}gallery_pic
WHERE approved = 1 AND totalratings > 0 ORDER BY ratingaverage DESC LIMIT 10");
replace with (code copied from Gallery 2.5.7.x)
// Top Rated
$result = $smcFunc['db_query']('', "
SELECT
id_picture, title,rating
FROM {db_prefix}gallery_pic
WHERE approved = 1 AND totalratings > 0 ORDER BY rating DESC LIMIT 10");