Begin by navigating to the Gong API documentation. Familiarize yourself with the available endpoints and data types you can access. Note the authentication method required, typically via API keys.

Log into your Gong account and navigate to the API settings. Generate a new API key that you'll use to authenticate your requests. Ensure you have the necessary permissions to access the data you need.

Determine which specific data you need to export from Gong. Gong’s API documentation will list endpoints like conversations, calls, users, etc. Decide which endpoints you require for your CSV file.

Develop a script using a programming language like Python. Utilize libraries such as `requests` to make HTTP GET requests to the Gong API endpoints identified in the previous step. Use your API key for authentication in the headers.

Example in Python:
```python
import requests

api_key = 'your_api_key_here'
headers = {
'Authorization': f'Bearer {api_key}',
'Content-Type': 'application/json'
}
response = requests.get('https://api.gong.io/v2/conversations', headers=headers)
data = response.json()
```

Once data is fetched, process it as needed. Convert the JSON response into a structured format suitable for CSV. This might involve selecting specific fields or flattening nested JSON structures.

Example in Python:
```python
import pandas as pd

# Assuming 'data' is a list of dictionaries
records = data.get('results', [])
df = pd.DataFrame(records)
```

Use a library like `pandas` in Python to export the structured data to a CSV file. Specify the file path and name for the CSV file and use `DataFrame.to_csv()` method to save the data.

Example in Python:
```python
df.to_csv('gong_data.csv', index=False)
```

After exporting, open the CSV file to verify that all data is correctly formatted and complete. Secure the file by setting appropriate permissions and store it in a safe location, ensuring that sensitive data is protected.

By following these steps, you can efficiently export data from Gong to a CSV file without the need for third-party connectors or integrations.