You're going to have to source this because there's been absolutely no need for gas plants in the two cities I've lived in that were both powdered by nuclear in Europe.
Many US nuclear plants are incapable of cycling power output up or down without changes to procedures or equipment.
If you compare France and Germany gas portion of the overall electricity production is quite similar (it's a bit tricky to compare, Germany produced 12% and France 7% but in different years, France gas accounts to 10% of their installed capacity)