"(Gerhart) went there and he loved it," Tello said.
"I like working with him. I know if we go to the same school, I'll keep my head on straight," Tello joked.
As a junior, Tello was named first team all-Inland Valley and second team all-league. He reports a 2.5 core GPA and will take his SAT during the school year.
Tello plays guard at Norco. Though he said Colorado coaches haven't addressed the issue specifically with him yet, he expects he'll play guard or tackle at CU.
"It doesn't matter," Tello said of his position preference.
Tello had previously said he wanted to wait until after his senior season to make a commitment. Obviously, he had a change of heart recently.
"I didn't want them to give away my scholarship. I know they fill up fast. I didn't want to risk the chance of not being able to play with Garth (in college)," he said.
Junior offensive lineman Kyle Johnson also took an unofficial visit to Boulder with Gerhart in August. Referring to Johnson, Tello said, "Hopefully, we'll have another lineman coming there the following year."