2007 Dodge Ram Having troubles

I only did on spark plug at time and I don't know what you mean gaping the plugs

It's a cheap tool you can get at like autozone for like 1-2$, it lets you gap the spark plug, otherwise widen the gap between the electrodes. It has to be within you vehicles specification or your car will run poor. Specification should be labeled in engine bay or can ask the counter guy what is the vehicles gap spec.
http://m.wikihow.com/Gap-a-Spark-Plug

The spec gap is 0.040 in. Does the plug not come gap out of the package

Not sure it depends on company that sells them, for my Nissan I had to gap them NGK, while my Ford Expedition they were gapped MOTORCRAFT. Take the easiest one out and see if it's in the correct gap, if yes then all your spark gaps are good.

I used a set of champion double platinum power plugs

Even though they are Factory, might not mean they are have been gapped, I would just take out the easiest one check gap if it's in range then all other spark plugs are good. Next thing would to see if you connected everything back correctly.

I currently don't have a code reader

Can call auto part stores near you to see if they can Scan CEL, or shops that do it for free. Another thing you can do is buy a scanner from Amazon. There is a cheap one that cost like 20-25$ (Autel) I believe that scan CEL, Clear codes, Freeze frame, Live Data, and I/m readiness, friend has it I thought it was good thing, saves you money I would. Say for future stuff.