how can I use the data to train an LLM with it to use the data to generate usable output for me?

do you have your own LLM (like Gemini, ChatGPT, etc.) integrated in Workspace or if you can create a link to the most widely used LLM to feed it with data. How can I use the data to train an LLM with it to use the data to generate usable output for me?

it can be different application from screening by writing a text about what kind of companies I’m looking for to creating Excel spreadsheets in a specific way how I like it, or asking which kind of charts have a specific pattern, what kind of KPIs a specific company is reporting and how these have developed over time, validating sell side research reports with the actual numbers, etc.