33 cards where the color identity ≤ GU and it’s legal in Commander and (the text includes “gain haste” or the text includes “have haste” or the text includes “gains haste”)

Agility Bobblehead (Fallout #126)
Alaundo the Seer (Commander Legends: Battle for Baldur's Gate #264)
Cogwork Assembler (Double Masters #242)
Concordant Crossroads (Double Masters 2022 #141)
Contortionist Otter Storm (Unfinity Sticker Sheets #15)
Crashing Drawbridge (Commander Masters #944)
Dire Wolf Prowler (Adventures in the Forgotten Realms #179)
Dollhouse of Horrors (Innistrad: Crimson Vow #255)
Echo Chamber (Tempest #282)
Eriette's Tempting Apple (Wilds of Eldraine #245)
Finale of Devastation (Commander Masters #289)
God-Pharaoh's Gift (Hour of Devastation #161)
Hall of the Bandit Lord (Champions of Kamigawa #277)
Haunted House (Unfinity #217a)
Helm of the Host (Dominaria #217)
Jawbone Skulkin (Eventide #170)
Magus of the Unseen (Masters Edition II #53)
Mimic Vat (New Capenna Commander #372)
Overtaker (Mercadian Masques #89)
Ravenous Sailback (March of the Machine #202)
Ray of Command (Duel Decks: Jace vs. Vraska #29)
Reflex Sliver (Time Spiral Remastered #226)
Reins of Power (Commander Legends: Battle for Baldur's Gate #734)
Rootwire Amalgam (The Brothers' War #203)
Runadi, Behemoth Caller (Jumpstart 2022 #44)
Shifty Doppelganger (Odyssey #101)
Surrak and Goreclaw (March of the Machine #337)
Surrak, the Hunt Caller (Commander Masters #326)
Thornling (Conflux #95)
Touch of Vitae (Ice Age #271)
Vitaspore Thallid (Planar Chaos #143)
Walking Bulwark (Dominaria United #241)
Welcome to . . . // Jurassic Park (Jurassic World Collection #7)
Welcome to . . . // Jurassic Park (Jurassic World Collection #7)

This search is finished. Now the real work can begin.