A custom Gemini 'Gem' that checks repetitive documents against your checklist

🧰 Before you start

• A Google account
• Your checklist for that document type (even a rough list)

🪜 Steps (tick as you go)

1. ☐
   1. Open Gemini on a computer

   Go to gemini.google.com and sign in. Gems are easiest to create on a computer.

2. ☐
   2. Create a new Gem

   Open Explore Gems (or Gems manager) and click New Gem. Name it, e.g. 'Quote Checker'.

3. ☐
   3. Paste the instructions

   Copy the 'Document checker' prompt below into the instructions box and fill in your checklist.

4. ☐
   4. Add reference files

   Upload your standard terms, price list or a 'good example' so the Gem compares against them.

5. ☐
   5. Test with old documents

   Give it 2-3 documents you've already checked and see if it spots the same issues.

6. ☐
   6. Use it every time

   Open the Gem, upload the new document, and read its checklist report. You still make the decision.

💬 Prompts to copy

You check [document type, e.g. contractor renovation quotes] for [business].
For every document I upload, go through this checklist and mark each item ✅ present, ⚠️ unclear, or ❌ missing:
[1. Company name and SSM registration number]
[2. Itemised prices in MYR with quantities]
[3. Payment schedule and deposit %]
[4. Start and finish dates]
[5. Warranty period]
[6. Who pays for damage / clean-up]
Then list anything unusual compared with the reference files, quoting the exact words. End with 3 questions I should ask. Don't give legal advice; flag legal points for a professional.

🔗 Links

• Reddit thread (source): https://www.reddit.com/r/GeminiAI/comments/1t1x8c2/anyone_here_actually_using_gemini_daily_for_real/
• Gemini at work: a practical guide (Google): https://workspace.google.com/learning/report/content/geminiatworkapracticalguide

From https://usecasy.com/use-case/gemini-gem-document-checker/ · Guide checked 15 October 2026 · Prices are rough and shown in USD unless stated (MYR where relevant).