gzrecover -v MyRaspberryPI03_2013.img.gz 
Opened input file for reading: MyRaspberryPI03_2013.img.gz
Opened output file for writing: MyRaspberryPI03_2013.img.recovered
Found error at byte 1770153227 in input stream
Found good data at byte 1769996288 in input stream
Total decompressed output = -571998208 bytes
gzrecover -v MyRaspberryPI03_2013.img.gz  22,08s user 31,05s system 6% cpu 14:32,94 total