If you like it and it's a big plant and you would like more plants, you can split it and plant the divisions as separate plants. If any small bits break off they would be better put into pots and allowed to grow on a bit and planted out in a couple of months time.
Off hand, I can't think of any hardy geraniums that don't like being divided.
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Off hand, I can't think of any hardy geraniums that don't like being divided.