They look as if they've been gorgeous but perhaps they didn't last as long as you'd hoped?
They don't really have enough space in that pot and perhaps they didn't get enough water? I like to plant my gladioli with at least 6" of soil above them and 6" apart.
Now they've flowered the plants will start to die down and the goodness from the leaves will be taken up by the corms(bulbs) so they can grow and flower again next year.
I think that if I were you I'd let them die down, and then when the weather gets cold I'd move the pots into somewhere frost-free and let the compost dry out.
Then next March/April divide your gladioli corms into 3 lots and plant them in three pots at intervals of a fortnight - then the flowering period will be staggered and you'll have a smile on your face for longer.