I'm not sure what is meant by (g). If it is grammage, gsm, or g/m2, then 110lbs cardstock is between 270-308gsm. Paper weights are confusing because there are different categories such as "text" and "cover/card". For example, an 8.5x11 inch sheet of 100lbs "text" weighs less than 100lbs "card" because text weight is measured with a stack of paper that has a larger dimension than that of the stack of cardstock.
But you don't have to use the same paper weight as I do. Just find some nice thick cardstock you think will do nicely as a cover that can be run through a laser printer.