What GEO actually is
Generative engine optimisation is the practice of making an organisation's public information consistent, structured and easy to extract, so systems that generate answers have accurate material to work from. It overlaps with SEO but the target is different: SEO competes for a position, GEO competes for an accurate description.
No responsible practitioner can promise inclusion in an AI answer. Ranking and citation behaviour is opaque, changes frequently and differs per engine. What can be improved is the input: clarity, structure, consistency and accessibility of your own published facts.