I stopped wearing the gel ones as they ruined my real nails.
My nails have always grown but always ended up splitting off, however, since I got diagnosed with malabsorbtion and been on treatment, the righting of my vitamin and mineral balances has made an amazing difference and my nails have never been in such good condition.
So, might be worth making sure you are getting all your proper nutrients.
I also find a decent regular manicure with treatments also helps keep my nails growing and in good condition, like how having my hair trimmed regularly keeps it growing better in in better condition I guess.