Last year, our 'wine and roses' gladiolus were a huge success, and this year we have a beautiful yellow glad, nova lux, and a close cousin Abyssinian gladiolus (also known as gladiolus murielae or peacock gladiolus). These plants can be treated the same (except the Abyssinian glads may be hardy, more about that later).
Whether you bought the gladioli in toilet paper rolls or as corms (technically, they are corms, not bulbs), all you need to do is plant them. They can be planted in the garden or in containers.
The toilet paper tubes can be planted together, or you can give them some room (they look great planted in a row 6"-10" apart). Cover the tops of the toilet paper rolls with soil and water well.
If you are planting corms, dig a hole 4"-6" deep and place the corm with the pointed end facing up. If you really can't tell which end is up, plant them sideways: they will be fine.
It's a good idea to put a stake or a sturdy stick in to stake the plants, because they can get pretty heavy and may not want to stand up straight.
After they bloom, let them grow to the end of the season. After the first frost, dig up the corms (they will be much bigger!) and store them is a cool, dry place, and you can plant them next year.
The Nova Lux corms may survive the winter in the ground, but probably not. The Abyssinian glads are hardier, and they may perennialize.