Expert Property Management for Your Peace of Mind

GMS is a financially oriented firm with extensive knowledge and experience managing New York co-ops and condominiums. We use our deep know-how and leverage our back office team to manage every detail of your property.

Top Tier Residential Management 
in New York

We have extensive experience serving the New York community, including Brooklyn, Queens, Staten Island and Nassau County. Our portfolio includes a wide variety of condominiums and co-ops across New York.

Proven Success, Value Adding Service 

Our properties stay with us for years, with our proven success based on the value we add to each property and the relationships we build with our Boards, Owners and Tenants. We strive to increase your property value, reduce expenses, and build trusting relationships with each property.


Average Increase in Property Value


Average Reduction in Expenses

Meet the Principle

Marsha Grant

With extensive experience in real estate management, banking and finance, Marsha is a hands-on, knowledgeable manager and problem solver. Marsha is a licensed NYS real estate broker and a licensed NYS insurance broker. Marsha’s professional career has always revolved around management and finance, and her extensive experience makes her an expert hands-on manager at GMS.

Marsha has her BA in Business Accounting from Hunter College, and holds an MBA from St. John’s University.

Expert Back Office
and Team Mentality

Our back office is made up of hard-working knowledgeable staff members who genuinely care about your property. The GMS team mentality is unique to our operations. We leverage each team member’s unique skillset to efficiently solve problems and to provide each property with the highest quality services.  

Interested in joining the team?

Thank you for your interest!

Thank you for your interest!

Please fill out this form and you will receive an e-mail with the brochure.


The form was submitted successfully!