Immigration regulations can change over time, so it's crucial to consult official government sources or seek advice from a qualified immigration professional for the most up-to-date and accurate information.
However, I can provide some general insights on the subject. In Canada, spousal sponsorship allows Canadian citizens or permanent residents to sponsor their spouses or common-law partners for permanent residency. If you get married to your girlfriend in Canada while on a visit visa, you might be able to apply for spousal sponsorship afterward.
When you apply for spousal sponsorship, your girlfriend (the sponsor) must meet certain criteria, including demonstrating the ability to support you financially during the sponsorship process. Once the sponsorship application is approved, you may be eligible to apply for an open work permit while your permanent residency application is being processed.
Keep in mind that obtaining a work permit or permanent residency through spousal sponsorship is subject to various eligibility requirements and processing times. It's essential to thoroughly research the current immigration regulations and consult with Canadian immigration authorities or an immigration lawyer to understand your specific situation better and explore all available options.
Additionally, remember that it's essential to comply with all Canadian immigration laws and regulations to avoid any legal issues while in the country.