Why did Gandalf have a ring?

[Sardy]

Originally Posted by narfforc

The Flame Imperishable/Secret fire was placed in Arda at the creation of world. It is believed by some that the Ainur could use this Secret Fire in actions in accord with the design created in the Music.

While there's certainly no doubt that the Secret Fire was a reference to the Flame Imperishable, could Gandalf in his infinite wit, have also been cleverly referring to his secret possession of the ring of fire?