If you are trying to integrate Swagger into your Gin application, but it is not registered, it could be due to a few reasons:

1. Swagger is not installed: Make sure that Swagger is installed on your system before trying to integrate it into your Gin application. You can download Swagger from the official website and follow the installation instructions.
2. Incorrect Swagger configuration: Check the configuration settings in your Swagger UI to make sure that it is set up correctly. Verify that the version number of Swagger is correctly configured and that the Swagger API URL is set up correctly.
3. Incorrect Gin configuration: Make sure that the Gin framework is set up correctly and that the Swagger configuration is properly set up in your Gin application.
4. CORS issue: Ensure that the CORS policy in your Gin application allows requests from the Swagger API. You can configure CORS settings in your Gin application by adding the following code:

```python from flask import Flask, request from flask_cors import CORS

app = Flask(name) cors = CORS(app)

@app.route('/api/v1', methods=['GET']) def get_api_v1(): # your API code here return {'message': 'API v1 endpoint is accessible'} ```

Make sure that the CORS policy in your Gin application allows requests from the Swagger API. If none of these solutions work, you can try reaching out to the Swagger community or documentation for further assistance.