GP Systems

GP Systems operates from its Chillicothe headquarters at 2020 E. Wilkins Drive, serving residential and commercial clients throughout Central Illinois. The contractor maintains an impressive 4.6-star rating drawn from 26 verified customer reviews, reflecting consistent service quality in a region spanning cities including Peoria, Bloomington, Springfield, and the Quad Cities. Founded through the acquisition of a long-standing local operation, GP Systems now operates as part of the Waldinger Corporation, bringing corporate-level resources while retaining neighborhood-level relationships with homeowner and business clients alike.

What distinguishes GP Systems is its deep roots in the sheet metal trades, a legacy carried forward from founding partners Bill Goad and Tony Prayne who collectively amassed over six decades in HVAC and sheet metal fabrication. This background proves significant for homeowners requiring custom ductwork modifications or commercial clients needing specialized ventilation solutions. The company handles both emergency demand service calls and new equipment installations, giving them capability across the full project spectrum from quick repairs to complete system replacements.

Customer stories from reviewers reveal the technician team Members Tony, Nick, Brian, Kyle, and Adam completed a same-day system replacement for Mack and Conway after their AC failed on a Friday evening, finishing by 4:30 the following afternoon. Another reviewer, Rachel, specifically praised technician Joe for his respectful communication and thorough approach with an oil burning furnace, taking time to explain each step and optimize the system for future performance. However, one reviewer did flag pricing concerns, noting a final bill significantly higher than initial estimates for a straightforward repair.