If I create Google Account without Gmail today, will I be able to change my mind and acquire Gmail address in the future, keeping the same Google Account? (The last part is important because other people might share content with a Google account I give them so I don't really want to be changing Google accounts altogether.)
Google Account – Obtain Gmail Later Without Initial Gmail Setup
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Best Answer
Yes, you will be able to do so.
From https://support.google.com/accounts/answer/72198?hl=en