design of a gsm module

Actually i am doing a project involving both GPS and GSM technologies for which i need a gsm module and the main problem here is i want to design a gsm module myself instead of buying a readily available one.As i am clueless regarding how to design,can anyone help me in this issue?

No problem. Normally, these designs are done by teams of experienced designers. But if your are a clueless individual, it should not take longer than 5 minutes.