If you use Ollama:

  ollama pull gemma4:e2b   # smallest                                                                 
  ollama run gemma4:e2b

  # or larger:                                                                                        
  ollama pull gemma4:e4b                                                                              
  ollama pull gemma4:26b                                                                              
  ollama pull gemma4:31b

If you use the 'run' command, it pulls automatically for you