There's no globally recognized institution called "Global Open University Nagaland." While there might be open universities in Nagaland, or institutions using similar wording in their name, a quick search doesn't reveal a reputable university with that exact name. This strongly suggests it's
not a valid or accredited institution.
Before enrolling in any online university, especially one you haven't heard of, always verify its accreditation and legitimacy through official channels in the region it claims to operate. Look for official government recognition and accreditation from relevant bodies.