starting a
lobbying
firm is easy.
becoming a
great one isn't.

It is your fundamental right to have a voice in the decisions that impact your life. For over 40 years, GCSI has been a trusted name, providing expert guidance and strategic representation. Known in all circles of influence for delivering the results our clients demand, we go beyond simply navigating the political system-we make sure your interests are prioritized, and your goals are achieved. Let's turn the tables and make the government work for you, because your rights and priorities deserve to be at the forefront of every decision.

voted michigan's

“most effective”

multi-client lobbying firm for 20 consecutive years

MIRS Capitol Capsule poll of Lansing insiders

TRUSTED PARTNERS

GCSI represents a diverse client base including corporations, non-profits, and associations, providing strategic advocacy across Michigan.

THE GCSI ADVANTAGE

GCSI's award-winning team offers hundreds of years of combined experience, professionalism, and integrity to serve you.

PROVEN OVER TIME

With over 40 years in business, GCSI delivers trusted, experienced advocacy in Michigan’s legislative and regulatory arenas.

Our Team Has The Expertise You Need

GCSI’s definition of government affairs includes a multi-faceted approach to communicating with all levels of government on a variety of issues. We combine a strategic approach to relationship development, qualified research, aggressive advocacy, and political intuition — all that accrue to the benefit of our clients. Since 1983, GCSI has grown to become a leader in the industry as Michigan’s premier government affairs firm. GCSI is comprised of a diverse group of highly acclaimed professionals with a single-minded focus on client service, including federal, state, and local lobbying, grassroots organization, and procurement.

Our Team Has The Expertise You Need

GCSI’s definition of government affairs includes a multi-faceted approach to communicating with all levels of government on a variety of issues. We combine a strategic approach to relationship development, qualified research, aggressive advocacy, and political intuition — all that accrue to the benefit of our clients. Since 1983, GCSI has grown to become a leader in the industry as Michigan’s premier government affairs firm. GCSI is comprised of a diverse group of highly acclaimed professionals with a single-minded focus on client service, including federal, state, and local lobbying, grassroots organization, and procurement.