Michael Strahan is embracing being a grandpa, but doesn’t exactly want to be called one.

The Good Morning America co-anchor—who became a first-time grandparent when his eldest daughter Tanita Strahan gave birth to baby boy Onyx Sept. 22—revealed why he doesn’t want to use the traditional moniker as he steps into his new role.

“It’s the most amazing feeling ‘cause I don’t feel old enough,” the 52-year-old told Jimmy Fallon during an appearance on The Tonight Show Sept. 23. “Everyone’s like, ‘What is he gonna call you?’ I don’t know. I almost want to do a survey.”

When the late-night host proposed he go by “Papa,” Strahan suggested adopting the name “Gap-pa,” in a nod to his trademark gapped teeth.

While Michael tests the waters on the moniker, he’s enjoying this new chapter with his family.

“I’m so happy for my daughter Tanita and Calenta [Mincey], her boyfriend,” the former NFL star gushed, adding that baby Onyx is a “great addition to the family.”