Obey 2o

Hello, I have a problem with my AVIC F550BT, I lost the original SD card gps. I'd like to know how I can do to rebuild the gps working again as before. I search the internet but nothing original software. I try to put the Igo Primo 2 but the unit does not want to read nothing appears software. Sorry for my English but I go through a Google Transalate because I am French . Thank you for your future response.