Gateway Mining (ASX:GML) has extended the defined strike of gold mineralisation at the Cowza prospect from approximately 2.5 kilometres to approximately 3.5 kilometres, while reporting additional high grade aircore drill results and confirming mineralisation remains open in all directions. We break down the latest drilling results, the commencement of a second RC rig at Cowza, pending northern assays, and what the company says these developments mean for the ongoing exploration program.