The icloud.com address that Apple would have reserved should be a variation on your me.com address and they can be used interchangeable.
As long as all you did was create a me.com email address you can change the gmail address Apple ID to that address.
Changing the email address you use for your Apple ID -
But if you have actually created an Apple ID from the me.com address, then no, there is nothing that can be done, as you have already done it. And Apple does not combine Apple IDs no ransfer the content from one Apple ID to another Apple ID.