How to Use Claude Skills on ChatGPT and Gemini (Step-by-Step)
The Claude Skills was built for Claude. But if you use ChatGPT or Gemini, the skills still work — you just load them differently.
Both platforms let you upload files, set standing instructions, and create a workspace where every conversation starts with your rules already loaded. The .md skill files drop straight in. You don’t need Claude to get the full benefit of the pack.
This guide shows you how to use claude skills on ChatGPT and Gemini, step by step, with nothing skipped. The whole process takes about two minutes per platform.
Why the Skills Pack Works on Any AI Platform
Claude Skills is a set of .md files — plain text documents written in markdown. Each file contains a detailed set of instructions: what to write, how to format it, what to avoid, what rules to follow.
Plain text works everywhere. ChatGPT reads it. Gemini reads it. Copilot reads it. Any AI tool that accepts file uploads or custom instructions can use these files. The format isn’t Claude-specific — it’s just structured instructions written clearly.
The one thing that changes between platforms is where you put the file and how you tell the AI to use it. That’s what this guide covers.
What You Need Before You Start
For ChatGPT: A ChatGPT account. Projects are available on free, Plus, and Pro plans.
For Gemini: A Google account. Basic Gems are free. For full file upload support in Gems, you need Gemini Advanced (part of Google One AI Premium). If you’re on the free plan, you can still paste the skill content directly into the Instructions box — it works the same way.
Your skill files: Downloaded from promptguy.io. Each file ends in .md. You’ll upload these directly into the platforms.
How to Use Claude Skills on ChatGPT and Gemini
How to Set Up Claude Skills on ChatGPT
ChatGPT calls its custom workspaces Projects. A Project is a space where your files, instructions, and conversations all live together. Every conversation you start inside a Project automatically inherits the files and rules you’ve set up. You set it up once. It works every time after that.
Step 1: Create a New Project
Open ChatGPT. Look for Projects in the left sidebar. Click it, then click New Project.
Name it after the skill you’re loading. Something like:
- Prompt Guy — Blog Post Writer
- Prompt Guy — Newsletter Skill
- Prompt Guy — Content & Writing
Keep the name clear so you can find it fast later.
Step 2: Add Your Skill File as a Source
Inside the Project, look for the Add files option — it may show as a paperclip icon or a Sources section depending on your interface version.
Click it and upload your .md file from the Prompt Guy Skills Pack. ChatGPT processes the file and adds it to the Project’s knowledge base. Once it’s listed there, the AI can read it.
If you want multiple skills in one Project, you can upload several files here. ChatGPT supports multiple file uploads per Project.
Step 3: Add the Activation Instruction
This step is the one most people skip — and it’s why their uploaded files do nothing.
Uploading the file gives the AI access to it. The instruction tells the AI to actually use it. Without this second step, the file sits there and the AI ignores it.
Click the three dots (⋯) next to your Project name, then select Project Settings. Find the custom instructions field and paste this in exactly:
For every conversation in this project, always refer to the uploaded .md file and follow the instructions and rules it contains. Treat it as your primary guide for how to respond.
Click Save. That’s the full setup.
Step 4: Start a Conversation Inside the Project
Open the Project and start a new chat. ChatGPT now reads your skill file at the start of every conversation and follows its rules throughout.
Test it with a simple task — ask it to write something the skill covers. If it follows the format and rules from the file, the setup worked.
How to Set Up the Skills Pack on Gemini
Gemini calls its custom AI workspaces Gems. A Gem is a version of Gemini you’ve pre-configured with a specific name, instructions, and reference files. Every conversation you start inside a Gem follows the setup you defined.
Step 1: Open Gems and Create a New Gem
Go to gemini.google.com. In the left sidebar, click Explore Gems, then click New Gem in the top right.
You’ll see the Gem editor — a setup screen with fields for name, instructions, and knowledge files.
Step 2: Name Your Gem
Give it a name that matches the skill you’re loading:
- Prompt Guy — Content & Writing
- Prompt Guy — Blog Post Skill
- Prompt Guy — Research
You’ll also see an optional description field. Fill it in if you plan to create multiple Gems — it helps you remember what each one does.
Step 3: Upload Your Skill File to the Knowledge Section
Scroll down past the Instructions field. You’ll find a section called Knowledge with an Add files button or a + icon.
Click it and upload your .md file from the Prompt Guy Skills Pack. Gemini supports up to 10 files per Gem, with each file up to 100MB. Your skill files are small — they’ll upload in seconds.
If you use Google Workspace, you can also link directly to a Google Doc instead of uploading a file. Any edits you make to that Doc will automatically update in the Gem.
Step 4: Add the Activation Instruction
Same logic as ChatGPT — the file alone isn’t enough. You need an instruction that tells Gemini to reference it.
In the Instructions field at the top, paste this:
For every conversation I start here, always refer to the .md file in the Knowledge section and follow the instructions and rules it contains. Treat it as your primary guide for how to respond in this Gem.
Step 5: Preview and Save
On the right side of the Gem editor, there’s a preview window. Type a quick test prompt to check that the Gem is reading the file and following the rules.
Once it looks right, click Save. Your Gem is live.
One Project or Gem Per Skill, or Combine Them?
| Setup | Best For | Downside |
|---|---|---|
| One Project/Gem per skill file | Focused use, easy to find the right one | More setups to manage |
| Multiple files in one Project/Gem | Convenience, fewer workspaces | AI may blend rules from different skills |
| Paste content into instructions instead of uploading | Free plans without file upload support | Instructions box has a character limit |
Most people start with one-per-skill and consolidate later once they know which ones they use most. If you’re on a free plan and can’t upload files, paste the full contents of the .md file directly into the Instructions box. It works — the AI reads it the same way.
Why the AI Sometimes Stops Following the Skill Rules
This happens in longer conversations when the context window fills up. The AI has a limit on how much it can hold in memory at once, and after many back-and-forth messages, it may start drifting from the skill rules.
The fix is a single line. Type this into the chat:
Refer back to the skill file in your knowledge/sources and follow its rules for the rest of this conversation.
That resets it immediately. You don’t need to start a new conversation or re-upload anything.
Frequently Asked Questions
Does the Prompt Guy Skills Pack actually work on ChatGPT and Gemini?
Yes. The skill files are plain markdown documents — structured instructions written in plain text. Both ChatGPT and Gemini read markdown files without issues. The core rules, formats, and behavior instructions transfer cleanly. You may occasionally need to remind the AI to follow the file rules in longer conversations, but the setup works the same way across platforms.
Do I need a paid plan to use ChatGPT Projects or Gemini Gems?
ChatGPT Projects are available on free, Plus, and Pro plans. Gemini Gems with full file upload support require Gemini Advanced. If you’re on Gemini’s free plan, paste the skill file content directly into the Instructions box — the character limit is generous and the behavior is the same.
Why is my AI ignoring the uploaded skill file?
Most likely, you uploaded the file but didn’t add the activation instruction telling the AI to use it. Go back into your Project Settings (ChatGPT) or Gem editor (Gemini) and add the instruction: “For every conversation here, always refer to the uploaded .md file and follow its instructions.” That’s the step that makes the file active.
Can I upload multiple skill files to the same Project or Gem?
Yes. ChatGPT Projects and Gemini Gems both support multiple file uploads. If you upload more than one skill file, update your instruction to say: “Always refer to all uploaded .md files and follow the rules they contain.” The AI will pull from whichever file is relevant to the task you’re running.
Where do I get the Prompt Guy Skills Pack?
The full pack is available at thinkaiprompt.gumroad.com.
Set It Up Once. Use It Every Session.
The whole point of the Skills Pack is that you stop repeating yourself every time you open a new chat. The rules, the format, the tone, the structure — it’s all in the file. You set it up once per platform and it runs automatically from that point forward.
Pick the platform you use most. Pick one skill file. Follow the steps above. Run one test task.
If the AI follows the rules in the file, you’re set. Every conversation after that starts with your setup already in place.
