technically yes.

We have what most groups would call a "Regular" GM (noting that some of our group's been playing together for nearly two decades now) who tends to run modules/paths/whatever in a longer form (and even then it's not always the same system. he ran Pathfinder 1 for a long time, then some Adventures in Middle Earth and broke things up with the Alien RPG and a MorkBorg one-shot), but after he's run an adventure/module or two someone will inevitably offer to run something. we just finished a Starfinder module and we've started a game of the Witcher RPG, both games were run by different players.

Once the Witcher game is done, Regular GM said he had a few games he'd picked up he'd like to try running.

There's no schedule, just "We've wrapped up the adventure and if GM wants to take a break and play as a PC, anyone here have an elevator pitch for something to play in the meanwhile?" and then we vote on the next game.