"Gigabit" authorized modems? - Time Warner Internet

This question is about ""Gigabit" authorized modems?", with Time Warner Cable internet and apps. I just upgraded to Gigabit and would like to swap out the spectrum provided modem for my own. Spectrum's website does not show any authorized list of third-party modems for gigabit speeds.

Has anyone done this?

"Gigabit" authorized modems??