The realm of cloud computing has been an undertaking that has captivated the tech world for over a decade, and Google Cloud Platform (GCP) is a prominent player in this game. As a robust suite of cloud computing services that runs on the same infrastructure that Google uses for its end-user products, such as YouTube and Google Search, GCP has attracted a multitude of enterprises across the globe. As a result, Google Cloud Consultants have emerged as an indispensable asset to companies planning to migrate to or optimize their existing GCP resources. However, my personal journey of hiring a Google Cloud Consultant was beset with challenges and lessons, which I am keen to share.

• Expertise in GCP is a must-have, but not sufficient : Having in-depth knowledge of GCP components, such as Compute Engine, Kubernetes Engine, Bigtable, and Firestore is a given. But, it's equally critical that the consultant understands your specific business requirements to tailor the cloud solution that best fits your needs, irrespective of the complex technical dynamics at play.
• Certifications matter : Google Cloud's certification programs are designed to provide a benchmark for skills proficiency. Look for certifications like Professional Cloud Architect or Professional Data Engineer, which denote a consultant's proficiency and commitment to staying current with the latest GCP developments.
• Experience is not fungible : Migrating your data and applications to the cloud or optimizing your current cloud resources is a complex task that requires proven experience. While many consultants may list impressive credentials, nothing beats hands-on experience in your specific industry or with your specific technology stack.
• Beware of one-size-fits-all solutions : Cloud implementation is not a monolithic process. Each business has its unique needs and challenges. Be wary of a consultant who offers a generic solution without deeply understanding your business model, workflows, and future growth plans.
• Understand their approach to security : With the rapid developments in cloud technologies, security threats are evolving faster than ever. The consultant needs to exhibit an intimate understanding of the most recent security practices on GCP and demonstrate a proactive approach to dealing with potential security issues.
• Value of a robust network : A Google Cloud Consultant should have a strong network of other IT professionals who can be drawn upon for their specialty knowledge, such as machine learning experts, data scientists, and cybersecurity specialists. This network amplifies the consultant's own capabilities.
• The importance of communication skills : The consultant is not just a technical implementer but also a bridge between the tech team and the business stakeholders. The ability to translate complex technical jargon into business language is crucial. Make sure your consultant can communicate effectively with all stakeholders.
• Look for commitment to long-term partnership : The relationship with your consultant does not end with the implementation of the cloud solution. They should be flexible and responsive in providing post-implementation support and be willing to evolve their strategy as your business grows.
• Cost considerations : While cost should not be the primary deciding factor, it is nevertheless an essential consideration. Try to strike a balance between cost and value. Remember that a cheap solution might end up costing more in the long run due to potential quality issues.
• Test their knowledge of emerging trends : The cloud industry is rapidly evolving. A competent Google Cloud Consultant should be well-versed with the latest trends such as hybrid-cloud, multi-cloud, serverless computing, AI integration, and others, and provide advice on leveraging these trends for your business.

In conclusion, hiring a Google Cloud Consultant is not a straightforward process. It requires a good understanding of your specific business needs, careful vetting of the consultant's technical and soft skills, and a commitment to building a long-term partnership. Take the time to do it right, and the payoff can be substantial.