Boston property management and development. With fifty years of experience, our position as one of the best Boston property management companies can be attributed to first-class customer service, high quality work, and strong community involvement. GTI Properties currently manages over four hundred apartments and condo associations throughout the city, and over one million square feet of commercial space. Whether you are seeking a luxury apartment, an artists studio or gallery, retail shop, or commercial office, our property management services are second to none in Boston.