Gonna go with quarter horse, bay, carrying some pinto genes due to the white sclera around his right eye and the chrome.
He also appears to be a bit splay legged in the front, like my Trigger, also appears narrow through the chest, like Trigger... who is NOT a quarter horse and is often mistaken for a gaited horse.
This leads me to wonder if QHxSpotted Saddle Horse. That would explain the narrow set to his shoulders and fores and the chrome. IIUC, the gaited gene when crossed with a non-gaited horse, is a 50/50 thing. He may be half gaited horse, just didn't win the gaited lottery (Like Trigger most likely).
"We are here to laugh at the odds and live our lives so well that death will tremble to take us."