Not off the top of my head, but you could try yojoe.com and gijoewiki, and even wikipedia. They have tons of info. Sorry about the delay answering, been busy and haven't logged in for awhile.
You'll want G.I.Joe vs. Cobra the essential guide. It gives the history of Joe Colton which basically tells how GI Joe is formed. Plus GI Joe #1, which explains that the ARAH Joe, a special counter terrorist delta group, is called into action because of a threat of a new terrorist group called Cobra.
Hey I also need info on how GI Joe started, not the toy but the organization of GI JOE in Real American Hero started. basically how they started out before they fight COBRA in the 1980s. I wanna do a fanfic back story on them