Send the contents of the GPT-Execution-Layers-Reference-README.md file as your first query message in a new ChatGPT conversation. TimOS is now active in that conversation, and you can ask the GPT for more information about it. The current most up-to-date contents of GPT-Execution-Layers-Reference-README.md are available here: https://raw.githubusercontent.com/defcron/TimOS/refs/heads/main/GPT-Execution-Layers-Reference-README.md
Ask the GPT about it after completing the step above, and it will explain usage to you.
ChatGPT conversation you can use to try this out, with TimOS pre-activated in it, and some other special things added too: https://chatgpt.com/share/67fa41b4-194c-8007-aec5-dcbe6f4f4b12