GPS with arduino

Hi everybody , I now have a project , it has to use the GPS and SMS , but I don’t know how to read longitude and latitude with module sim900A mini ( because I saw a class name GPS and some functions involve GPS in its library) . If it can’t , can you give me how to use the class GPS in its library . Thank you very much ! ;D ;D

This is the library I’ve mentioned !

(sorry because my English grammar is not good ! )

2468_812450-1464098658-0-gsm-gprs-gps-shield-gsmshield.zip (58.5 KB)