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March 11, 20267 min read

How to Build Your Own Gemini Gem (Free AI Assistant)

Create custom AI assistants with Google Gemini — for free. Step-by-step guide to building Gems that search the web and follow your instructions.

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What is a Gemini Gem?

A Gem is Google's version of a custom AI assistant. You give it specific instructions, and it follows them every time.

The big advantage: Gemini can search the web FOR FREE. No paid subscription required for basic use.

Examples:

  • A research assistant that always cites sources
  • A rent analyzer that pulls live listing data
  • A content writer that matches your brand voice
  • Requirements: Google account (free tier works!)


    Step 1: Open Gem Manager

    1. Go to gemini.google.com

    2. Sign in with your Google account

    3. Click "Gem manager" in the left sidebar

    4. Click "New Gem"


    Step 2: Configure Your Gem

    Name

    Keep it clear and descriptive:

  • āœ… "Rent Survey Analyst"
  • āœ… "Meeting Notes Summarizer"
  • āŒ "Test Bot 3"
  • Instructions

    Tell the Gem how to behave:

    You are [ROLE].

    When a user asks about [TOPIC], you should:

    1. [First action]

    2. [Second action]

    3. [Third action]

    Format your response as:

    [Describe the format]

    Always:

  • [Rule 1]
  • [Rule 2]
  • Never:

  • [Anti-rule 1]

  • Step 3: Save Your Gem

    1. Click "Save"

    2. Your Gem appears in your Gem Manager


    Step 4: Share Your Gem

    1. Open your Gem

    2. Click the three dots menu (ā‹®)

    3. Click "Share"

    4. Choose "Anyone with the link"

    5. Copy the link


    Gemini vs. ChatGPT: When to Use Each

    | Feature | Gemini Gem | ChatGPT GPT |

    |---------|-----------|-------------|

    | **Cost** | Free tier available | Requires $20/mo Plus |

    | **Web Search** | āœ… Built-in free | āœ… With Plus |

    | **Google Integration** | āœ… Native | āŒ Limited |

    Use Gemini for free web search and Google ecosystem.

    Use ChatGPT for GPT Store distribution and Zillow integration.


    Pro Tips

    1. Tell It to Search

    "Always search the web for current data. Don't rely on training data."

    2. Request Citations

    "Include source URLs for any data you reference."

    3. Use Markdown Tables

    Gemini handles tables well. Define your format in instructions.

    4. Set a Persona

    "Professional but approachable. Concise. Use bullet points."

    Troubleshooting

    Gem doesn't search the web: Add explicit instruction to search.

    Gem forgets instructions: Keep under 2000 characters, put important rules first.

    Sharing doesn't work: May require Gemini Advanced in your region.


    Quick Start Checklist

  • [ ] Go to gemini.google.com/gems
  • [ ] Click "New Gem"
  • [ ] Enter Name and Instructions
  • [ ] Save and test
  • [ ] Share link (if desired)

  • Want a working example? Try my Rent Survey Analyst Gem — it's free.


    Created by Tony Self | TechTony.co

    TT

    Tony Self

    AI strategist, speaker, and consultant helping enterprises deploy AI without the risk. Decades of experience in real estate and technology.