interfacing aurdino uno with gps and gsm

i am doing a project on a smart stick which can help blind people.can any body suggest me a detail way to interface the GPS and gsm module with arduino. also please comment on how to extract coordinates from GPS.

Start with google "arduino gps" and have a look at the first hit. Perhaps read that and post some more specific questions about what you are trying to do.

Thanks for reply.i have read that already .i tried to run the code there and what i found was byte was no longer supported.

i am using gps gtpa010 module and sim 900a gsm module. i want to sms the coordinates to a particular number.i am even confused with the gps module whether its working properly or not.