I see about the same temps on my hemi as well. At cruise I'll be right above the first 1/4 line and will go as high as the middle in stop and go traffic at which point the fan comes on and it drops rapidly.
I was told several years ago that modem temperature gauges are specifically programmed to react slowly to prevent drivers from being concerned about a temp fluctuations. Essentially they only exist to tell you when you're over heating, middle is no real indication other than its operating within spec. The gauge in my Acura never moved a centimeter from the center, did I really think it never changed temp in 100 degree dead stop? Absolutely not, who knows how much it was varying.
I appreciate the honest gauge in the GC, very helpful in towing climbing situations.
2014 Overland - Granite, Hemi