We mitigate financial risk, enhance state and local tax compliance, and expand technology to turn tax into power, protection, and leverage.
Whether you’re entering new markets, launching new products, or reviewing current tax practices, GSE – The State Tax Experts ensures that every decision aligns with your broader business goals. We provide actionable strategies that minimize risk, uncover savings, and sustain compliance across every jurisdiction where you operate.
At GSE – The State Tax Experts, we view tax not as a cost center but as a lever for strategic growth. Our mission is simple: help you turn complexity into clarity and obligation into opportunity.
Contact GSE – The State Tax Experts to schedule a confidential consultation to discover how we can strengthen your SALT strategy and deliver measurable results.
Clients and Industries We Serve
Regardless of your industry, GSE acts as an extension of your tax department providing deep expertise, accurate insights, and actionable recommendations that reduce tax risk and accelerate results.
We manage the complete state and local tax compliance cycle — filings, reconciliations, audit defense, and M&A due diligence — so your business stays accurate, compliant, and audit-ready across every jurisdiction. From fixed asset reviews to complex integrations, we keep your compliance process running with precision and reliability.
Our experts uncover refund opportunities, manage valuations and appeals, and ensure you benefit from every eligible exemption, credit, and incentive. Whether identifying retroactive refund opportunities or defending assessments, GSE helps you protect profit margins and ensure you pay only your fair share, not a dollar more.
We help to strengthen your tax systems through intelligent automation and technology optimization. Our team reviews and reconfigures tax decision software, manages system implementations, and integrates automation tools that increase accuracy, improve reporting, and reduce manual work, creating scalable, future-ready compliance operations.
Tax complexity grows with every market expansion, product launch, and system change. The cost of inaction is missed refunds, audit exposure, and operational inefficiency and it compounds quickly. At GSE – The State Tax Experts, we turn that complexity into clarity, transforming compliance from a cost center into a strategic advantage that drives cash recovery, minimizes risk, and fuels long-term growth.
We have partnered with business owners to provide exceptional services throughout all of North America.
GSE is The State Tax Experts in the areas of sales and use, business license, excise, and other indirect taxes. The firm delivers customizable multi-state and local tax solutions to its clients.
Cambridge Tax is your business personal property and real estate tax experts. The firm has developed a tax tool that allows for comprehensive insight to all rules, laws, and regulations for every state that imposes taxes on real and personal property.
Advantous Law focuses exclusively on state and local tax legal matters. The firm provides legal opinions on complex tax matters and, when litigation is necessary, handles each stage of the litigation process, from administrative tribunals through the courts.
Directed Action supports C-level executives on their most critical projects. They partner with clients to enable, support, and achieve strategic transformation.
An affiliate organization of NABA, DOF members are minority owners of CPA and Professional Services firms. The member firms provide a variety of accounting, tax, finance and consulting services to corporations and small businesses, government, nonprofit organizations and individuals both nationally and globally.
With over 30 years of experience spanning state government, Fortune 500 corporations, and entrepreneurial leadership, Gwen is a force in the field of multistate and local taxation.
She has led tax strategy, compliance initiatives, and legislative policy execution, translating complex regulatory frameworks into practical business solutions. Her leadership has helped companies minimize tax exposure, manage audit risk, and unlock tax-saving opportunities across multiple jurisdictions.
As the visionary behind GSE – The State Tax Experts, she has built a firm that acts as a strategic extension of internal tax teams offering results-driven support to mid-size and large companies navigating growth, change, or compliance complexity.
Known for her ability to blend policy insight with operational execution, she brings a rare mix of public and private sector expertise to every engagement. She speaks the language of CFOs, understands the pressure of audit timelines, and thrives in environments where tax strategy must align with broader business goals.
Ask the Expert: State & Local Tax
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Note: Legally incorporated as Standberry Enterprises, Inc.
Doing Business As (DBA): GSE – The State Tax Experts