You are downloading the GTA: San Andreas XAP file v126.96.36.199 for Windows Phone. GTA: San Andreas is a paid and fun Action & Adventure game: ***PLEASE NOTE: Grand Theft Auto: San Andreas is only supported on the following devices: Nokia Lumia: 1520, 1320, 822, 820, 810, HTC: 8XT.*** ... You can now download the offline XAP file to install & try it.
Download Locations for GTA: San Andreas 188.8.131.52 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline GTA: San Andreas XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.