Dragon Ball Reveals the Official Super Saiyan 4 Gohan Design
via screenrant.com
Short excerpt below. Read at the original source.
Few Dragon Ballforms have reached the legendary status of Super Saiyan 4. The form debuted in Dragon Ball GT and was given exclusively to Goku, Vegeta, and Gogeta, leaving characters like Gohan and Trunks without access to the iconic form.