can anyone help me to go through this problems?
Tell me exactly how much searching you did. Never mind, I know the answer to that. None.
error: WProgram.h: No such file or directory
has been discussed many, many times. It no longer exists for version 1.0 and forward. That library is not compatible with 1.0 or later. If you want to make it compatible, you will need to replace WProgram.h with Arduino.h.
C:\Users\acer\Desktop\New folder\arduino-1.0.1\libraries\GSM_Shield/NewSoftSerial.h:71: error: conflicting return type specified for 'virtual void NewSoftSerial::write(uint8_t)'
\arduino-1.0.1\hardware\arduino\cores\arduino/Print.h:48: error: overriding 'virtual size_t Print::write(uint8_t)'
In file included from GSM_Shield_Call.cpp:13:
These messages have been discussed many, many times, too.
You should not be using NewSoftSerial with 1.0+. You should be using SoftwareSerial.
Fix these issues first, then see what messages you still get, if any.