To register on the Government e-Marketplace (GeM) portal in India, follow these steps:

1. Visit the GeM Portal: Go to the official GeM website by entering the following URL in your web browser: https://gem.gov.in/

2. Click on "Sign Up" or "Register": On the GeM homepage, you will typically find an option to "Sign Up" or "Register." Click on this option to start the registration process.

3. Choose Your User Type: GeM offers registration options for various user types, including buyers, sellers, and service providers. Select the appropriate user type based on your role.

4. Provide Your Details: Fill out the registration form with your personal or business information, including your name, email address, mobile number, and organization details. You will also need to create a unique username and password.

5. Verify Mobile Number and Email Address: GeM will send an OTP (One-Time Password) to the mobile number and email address you provided. Enter these OTPs to verify your contact information.

6. Complete KYC (Know Your Customer) Process: GeM may require you to complete the KYC process by providing additional documents and information, depending on your user type. For sellers, this may include uploading business registration documents.

7. Agree to Terms and Conditions: Review and accept the terms and conditions of using the GeM portal.

8. Submit Registration Form: After completing all the required fields and verifications, submit your registration form.

9. Wait for Approval: GeM administrators will review your registration request. Approval times may vary, but you should receive a confirmation email once your registration is approved.

10. Login to Your GeM Account: Once your registration is approved, you can log in to your GeM account using the username and password you created during the registration process.

11. Set Up Your Profile: After logging in, it's essential to complete your profile by providing additional details and information, such as your organization's GST details, PAN (Permanent Account Number), and bank account information if you intend to sell on the platform.

12. Start Using GeM: You can now use the GeM portal to either buy goods and services as a buyer or list products and services as a seller/service provider, depending on your user type.

Keep in mind that the registration process may be subject to changes and updates by the GeM authorities, so it's a good idea to visit the official GeM portal and review any specific registration guidelines or requirements that apply to your situation. Additionally, for sellers, you should be prepared to provide business-related documents during the KYC process.