The GAA’s corporate trustee looks set to be grilled in the High Court by a Castlebar-based sportswear firm fighting for its right to sell t-shirts bearing the GAA logo. Mr Justice Senan Allen has agreed to allow the cross examination by Savanagh Securities, the companybehind T-Rex Clothing, in what he described as “a skirmish in a long-running and complicated war about a trademark”. The dispute began in May 2015 when the secretary of Mayo GAA County Board wrote to Savanagh to complain that the firm was offering products for sale carrying the official Mayo GAA County crest, which it was…