Can I use this with multiple gmail accounts?
Can I use the Pro versions for two separate gmail accounts? And with they be displayed separately depending on which account I am signed into?
you can have multiple Todoist accounts, each linked to a different email address. However, if you want them all to be Premium, you'll need to purchase a Premium membership for each account, but you can do so and there's no limit to how many accounts you can have (both free or Premium).