C&G advises and acts for a number of conglomerates and multinationals, including companies in the energy and mining sectors, in challenging assessments for various taxes and other governmental impositions (such as business, franchise, national wealth, and real property taxes) and claiming tax refunds involving significant sums before various taxation authorities, administrative tribunals, and the Court of Tax Appeals and other courts. C&G's lawyers apply, to prosecution of tax cases handled by the firm, the same competence, diligence, and advocacy with which they litigate civil, commercial, and criminal disputes and arbitration proceedings.

The firm also provides tax advice in non-litigation scenarios. C&G assists clients in determining and implementing efficient tax structures and advises on tax compliance.

Mark Gutierrez, a partner of the firm, has been cited as a leading Philippine lawyer in the tax field by Chambers & Partners in its 2010, 2011, 2012, 2013, 2014, and 2015 Asia-Pacific publications.