Yes, in general you can just double everything. Do you use brewing software? I have Beersmith and there is a tool called "Scale Recipe" and will do the job with one click.
Yeah as mentioned you can double to get you in the ballpark, things that might change would be your og depending on the efficiency of whatever equipment you are using vs what you were using for 5 gallon. I use beersmith as well to scale recipes when needed.
You double the ingredients, but you also have to make sure that your equipment can handle twice the volume and weight. Times generally remain the same with the exception of heating and cooling.