Sorry youre not getting much help here, there might be a reason why. Exactly what
SIM card breakout board and GE865 breakout
did you buy from sparkfun?
one ? If so you have a completely assembled blank slate on which to make your software dreams come true.
(1) go to the GE865 manufacturers page at Telithttp://www.telit.com/en/products/gsm-gprs.php?p_ac=show&p=47
(2) download and read these
(4) download the applications notes and read them as needed
(5) develop the code to do WHAT YOU WANT
(a) decide EXACTLY what you want to do. if you dont know where you wanna go, nobody can direct you.
(b) learn about the different types of wireless phones, how they work, how their networks operate and the differences between them.
(c) learn what kind of wireless network, service and capabilities it takes to get you where you want to be.
Begin small and be prepared for a long and difficult voyage of discovery, mostly self-guided. Think of Columbus or Magellan. A simple goal might be "send an SMS formatted text message on <your favorite wireless provider> GSM network".
From the questions youre asking you might be waaay over your heads. If youre not getting very far very fast, watch other hackers and take advantage of what they release back to the community.