As he straightened his legs and rose up, Gilmore turned back to the counter-- long enough that he completely missed Scanlan fishing whatever it was out of his pocket. He touched what was, ostensibly, an ornate incense burner on the counter and tilted the lid back. A few tendrils of glittering purple smoke escaped from it and quickly snaked down to the ground before coalescing into a shape that was roughly catlike in appearance.
"Bring the wine, kindly," Gilmore requested as he placed the lid back down onto the burner. The Unseen Servant dissipated instantly at the order, though the beaded curtain fluttered with disturbance once more, hinting that the conjuration had passed through it.
"Gate stones?" He then repeated, fingertips tapping a little dance across the wood of the tabletop. There was a moment of recollection, the man's well-groomed eyebrows wrought together in thought. "Rare artifacts that facilitate teleportation," Gilmore gesticulated with a limp wrist as he launched into what was the magical equivalent of a nerd explaining science. "They're coded with the same conjurations as a Teleportation Circle, but limited in scope to the specific sequence of its partner. Theory has it that they were minor Vestiges of the Divergence. Teleportation magic is incredibly difficult to distill into physical objects because of the amount of minute detail required, making them difficult to replicate."
Dissertation thus delivered, the sorcerer used that same limp wrist to run his hand through his glorious hair. "Why do you ask, my friend? I recall that Vox Machina had a pair of such stones."
Which was to say, Gilmore knew his crafty, clever diminutive friend well enough to know that this was an idle question.