Mission and Culture


Providing our customers with the best quality, delivery, and overall value possible.


  • We are committed to meet and exceed, customer expectations at all times.
  • We strive to be a role model company within our industry.
  • We focus on continuous improvements throughout the manufacturing process which in turn helps our customers, suppliers and employees.
  • We believe success will be achieved by the personal growth of our employees.
  • We operate as a team and make decisions together to improve safety, quality, and efficiency.
  • We will strive to conserve, reuse, and recycle all materials with the objective of having zero impact on the environment.
  • We will continue to invest in our employee’s growth and the latest technology to secure a future with our customers.
2022 Top 50


GP Manufacturing was established in 1995 in Buchanan, Michigan. In 2019, Walls Holding Buchanan acquired GP Manufacturing.

GP is a precision CNC machine shop providing complex machined components via turning, milling, EDM (wire and plunge), 3D Printing and grinding (surface, ID/OD and hone). GP specializes in both prototype and production work for long term and loyal customer base in primarily the Aerospace and RV Industries.

At GP Manufacturing, Inc., we are extremely proud of our exceptional ability to consistently fulfill the needs of our clients. Throughout the last twenty-eight years, we have accumulated a wealth of experience as a trusted supplier within the industry. We understand that the quality and stability of the products you source are of utmost importance to your business success.

One of the major advantages of partnering with GP Manufacturing, Inc., is that we operate on a direct-to-factory pricing model. By eliminating intermediaries, we are able to offer competitive prices that will undoubtedly contribute to your bottom line. Additionally, our efficient manufacturing processes and economies of scale further enable us to maintain
cost-effectiveness without compromising on product quality.

We understand that your time is valuable, which is why we have made it a priority to provide prompt and reliable customer service. Our dedicated team is always available to address any inquiries or concerns you may have, ensuring that you receive a seamless experience when working with us. We are committed to building long-term relationships with our clients based on trust, transparency, and exceptional service.

We genuinely believe that a partnership between our companies would be mutually beneficial and would greatly contribute to the growth and success of both parties. We look forward to the opportunity of further discussing your specific requirements and how we can tailor our offerings to meet your needs.

Thank you for considering GP Manufacturing, Inc., as your supplier. We would be delighted to answer any questions you may have or provide any additional information you require. Please feel free to reach out to us at your convenience.


¹GP Manufacturing, Inc. is a certified women’s business enterprise through the Women’s Business Enterprise National Council (WBENC), the nation’s largest third party certifier of businesses owned and operated by women in the US. We recognize the commitment to supplier diversity that is embraced by corporations and government agencies today, and we can add diversity to your supply chain.