I'd recommend using Raspberry Pi Imager to configure Wi-Fi on your Raspberry Pi beforehand. Everything you need to get up and running is explained in the README of the GitHub repo and in the YouTube video.
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The functionality of GPT Home would be similar to an Amazon Alexa or Google Nest Hub. Currently the project integrates Philips Hue, OpenWeatherMap, Open-Meteo, Spotify, CalDAV, and routes actions with regular expressions. I want to try to reduce latency as much as possible while providing as many ways to customize the experience as I can. Working on integrating Home Assistant, LiteLLM, and maybe LangChain.