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Supported File Types

GC AI supports a wide range of file formats:

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Text Documents

  • .txt, .md, .markdown
  • .json, .html, .htm
  • .rtf

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Images

  • .png, .jpg, .jpeg
  • .heic, .heif

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Documents

  • .pdf, .doc, .docx
  • .pptx
  • .eml, .msg
Enhanced Document Features: For PDF and DOCX files, GC AI automatically reads and analyzes:
  • Tracked changes and revision history
  • Comments and reviewer feedback
  • Redlines and proposed modifications
Date Requirement: These enhanced features are only available for PDF and Word files uploaded since August 18, 2025. Files uploaded before this date will be processed without comment and tracked change analysis.

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Spreadsheets

  • .xlsx, .xlsm
  • .ods, .csv, .tsv
  • .numbers

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Audio Files

  • .mp3, .m4a
  • .wav, .webm
  • .ogg, .flac
Audio Transcription: Audio files are automatically transcribed using speech-to-text technology. The transcribed text becomes searchable and can be referenced in your chats just like any other document.

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File Limitations

When uploading files, keep these current limitations in mind:

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Per-File Limits

  • ZIP files work only in Vault manual upload fields.
  • Each file must be under 50MB.
  • Audio files must be under 25MB.

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ZIP Files in Vaults

Upload one ZIP file at a time to a Vault manual upload field. A ZIP file can be up to 1GB. Vaults import PDF, DOC, DOCX, and TXT files from the ZIP file. Vaults skip unsupported files and nested ZIP files. Each imported file must be under 50MB. A ZIP file can contain up to 10,000 entries and 10GB of uncompressed data. Vaults remove folder paths during import. If two files have the same name, Vaults add a number to the later file.

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Working with Multiple Documents

GC AI uses smart, on-demand document access. The AI reads, searches, and queries your documents as needed rather than loading everything into the context window at once. This lets you attach more documents to a chat than traditional approaches allow.
For very large document sets, the context usage indicator helps you monitor how much context is being used. If you’re approaching the limit, consider starting a new chat for a fresh context window.