Is it possible to create a GPT for my brand so that the writing will be consistent in tone, style, and topics? I went through the Brand Strategy for the brand but now how do I keep it going?

I used the Brand Strategy creation GPT and want to put it into a presentation. Got an AI that I could use to quickly put together some presentation slides?

Had an idea today but not sure if I'll be wasting my time... I am doing some continuing education as part of my coaching certification and was thinking of using Loom to create transcripts of each module and then adding the transcripts to ChatGPT as a way to "train it" in my coaching modality/techniques. Will this work or will it be a wasted effort?! Often as a coach it is hard to communicating how/why I want to coach people so thinking this may be a good way for it to know what I know...does that make sense?? Also, any prompt tips to use when I add the transcripts to ChatGPT?? Thanks so much!!

Of the customized GPTs we have access to, would one be best for writing YouTube descriptions of videos that I run the transcript of those through?

Is there an AI that will help me quickly create editable graphics for social media such as instagram stories slides? I tried the canva GPT and it's not doing what I thought it would