GPM Callen is a real estate company operating in the residential property market in McAllen, Texas. The company provides services related to buying, selling, and managing homes for individual clients and families in the local area. It serves clients seeking assistance with property transactions, offering guidance throughout the real estate process. GPM Callen operates within the real estate industry, focusing on facilitating residential property transactions and related services. The company aims to support homebuyers and sellers in navigating the housing market.