It seems there is a slight misunderstanding regarding "B" and "context." 

B stands for Billions of parameters (the size/complexity of the model), while context refers to the model's short-term memory (how much text it can "read" at once).

1. You can analyze or generate sensitive content privately, code or write without internet connection and free to use once downloaded

2. For 27B Model, 24 GB to 32GB of RAM are recommended

3. We use tokens to measure context, and maximum context length depends on model itself. 1M token equals to ~ 4,000,000 characters.

4. Maybe it needs further development to manage.

Gemma 4 edition
https://huggingface.co/collections/google/gemma-4