Sis Carolyn, do you have the GoToMeeting app installed on your toy? If yes,
once launched, all you need to do is TYPE IN the ACCESS CODE provided to
you; this should pull up the desired meeting and you can just tap on join.
This has been my experience on My Shiny Android Toys, I never have to enter
any phone numbers plus access codes to join a GoToMeeting's meeting!

BTW, same holds true for Zoom.

Sincerely,
Olusegun
Denver, Colorado