I live in gopher central! Most of the nurseries around here sell something like this:
http://gopherbasket.com/wireba...
They have to be a heavier mesh, nothing thin like chicken wire, it doesn't last.
We have a local guy that makes them and I bought over 100 when I first moved here. They are rounded like the shape of the 1 gal., 5 gal., and 20 gal pots and he adds a top lip overhang so prevent the gophers from coming up next to the cage and over and inside. Although a few of mine sank once the compost amended soil settled so I had to dig the soil out around it a bit. I only plant my daylilies and roses in the 5 gal and all bulbs in the 1 gal. Where I didn't use a cage for the bulbs, they were eaten.
I still need to set traps too.