[Bug] Multi-gpu finetuning in Unsloth

1. Did you update? pip install --upgrade unsloth unsloth_zoo -->yes
2. Colab or Kaggle or local / cloud -->cloud
3. Number GPUs used, use nvidia-smi --?> 4
4. Which notebook? Please link!
5. Which Unsloth version, TRL version, transformers version, PyTorch version?
6. Which trainer? SFTTrainer, GRPOTrainer etc --> SFTTrainer

Put Minimal code to reproduce error here ###Remove Hugging Face token###

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I am able to finetuned Gemma 3 4B model using unsloth in one gpu it is working fine, but when I am trying to use it in multi-gpu settings, I am not able to use it properly. Any help regarding multi-gpu support will be appriciate. Please help to set up multi-gpu finetuning through unsloth. Thanks