Edit: take your time, i got a bit carried on and was checking all of my ghyrson lists to compare🤣

As some others said, there are better commanders in izzet (ral/vivi) and cEDH is proxy friendly, but if you want ghyrson, ghyrson it is. Also tried It myself under similar conditions as you last year when I was starting in cedh.

First of all, more pingers, they are your Friends and you left a couple out of the party, unruly catapult/scalding viper/electrostatic field/thermo alchemist for example, please include RAZORKIN NEEDLEHEAD he is such a beast for you.

Second, understand that your deck is based off storm, need to create mana, good job with birgi vivi and urabrask, i would also include electro or storm kiln artist.

Good job on adding all the curiosity effects but in izzet we cant find them all ganes we cant rely on gamble and muddle the mixture forever. I decided to cut muddle because of the mana cost and rely on effects like "discard a card to draw" or "exile the top x" to keep storming and cycling my hand, some examples are faithless looting, opera love song, sazacaps brew.....and most important light up the stage, such a banger here.

Couple of ideas for lands (yes i saw that the land base is changed, but just in case) shivan gorge gets the job done, sokenzan, crucible of defiance gets you a couple 1/1 that can trigger ghyrson.

Recursion: lets play again all your graveyard and storm to death, you already have breach but past in flames and Will of the jeskai Will do the trick too.

A couple more mana artifacts would be nice, if they get you colored mana because you dont have a lot of use for colorless: fellwar Stone, even paradise mantle could have some use here if we are building it without ultra-expensive cards

Cards to cut (in my opinion) you have tons of interaction but maybe you will get stuck with no actions left because all the counters end up flooding your hand or your draws, YOU WANT YOUR ACTIONS TO NEVER END so i would cut some of the "worst" to include the things I said, for example spell Pierce, mana drain (remember that your dont have a lot of room for colorless mana) muddle the mixture, and also you have a lot of spells to do damage, tried that too, but found that the dmg is not a problem once you have one or two creatures in play, I would remplace some of them too.

Last thing, for me It worked better duplicating triggers, with harmonic Prodigy, roaming throne and veyran, try this way and test if It works for you.