Talking to a medic chum of mine, he is not at all a fan of multi-vitamins, on the basis they have a very little of lots of stuff and unlikely to have enough to improve any decent deficiencies. His advice is to measure levels, then supplement where required, with dosages based on requirements.
I know it isn't always easy to have your vitamins tested, and if you feel you want to, I reckon it'd be unlikely to do you any ahrm.
As for the gummies? I'd be wondering if they had sugar in them, but that should be listed on the ingredients list. Of course, if they have sugar it's depend how much and how many you need to take.
So, all in all the answer is "maybe or maybe not". Not helpful I know. Sorry.