how to interface arduino with a GSM

Actually i m trying to interface a GSM with arduino uno but i m getting a problem, it is continously coming as uploading error pls any one help me out from this situation

it is continously coming as uploading error pls any one help me out from this situation

You have not defined which shield you are using, shown any code, or shown the error messages. So, I'm guessing that explains why there have been no responses.

If the Arduino UNO uploads fine without the GSM Shield attached the failure is probably because the GSM Shield is interfering.