Allah neither actually perishes nor is it possible for Him to perish.
Allah has never ceased and can never cease to exist. Paradise and Hell, in contrast, are created; Allah preserves them, so they will not actually perish.
This preserves the distinction between the Creator's necessary, intrinsic permanence and the permanence granted to creatures.
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Paradise and Hell: Their Permanence, and the Decree of Good and Evil
Allah neither actually perishes nor is it possible for Him to perish.
Allah has never ceased and can never cease to exist. Paradise and Hell, in contrast, are created; Allah preserves them, so they will not actually perish.
This preserves the distinction between the Creator's necessary, intrinsic permanence and the permanence granted to creatures.