The given question refers to an award recognized at the World Governments Summit 2025 in Dubai. We need to identify which award is associated with acknowledging pioneering government initiatives that focus on innovation and social impact.

To arrive at the correct answer, let us analyze the given options:

1. Smart Governance Achievement Award: This award typically focuses on achievements related to smart governance practices, focusing on technology use and administrative efficiency.
2. Government Innovation Excellence Award: This award sounds plausible as it mentions "innovation," but the specific context or recognition for social impact isn't clear nor widely known in this context.
3. Global Public Leadership Award: This award would generally recognize leadership in public sectors globally, typically highlighting individuals or teams rather than initiatives.
4. Global Government Excellence Award: This award is the most likely to recognize "pioneering government initiatives worldwide for innovation and social impact" as it is broad and inclusive of both innovation and social impact, fitting the description.

Thus, considering the context and the content described, the Global Government Excellence Award is the correct answer. This award emphasizes global recognition for excellence in governmental initiatives, explicitly aimed at driving innovation and creating a social impact on a wide scale, aligning perfectly with the requirements mentioned in the question.

Conclusion: The correct option among the given choices is the Global Government Excellence Award.