MCLEAN, Va.--(BUSINESS WIRE)--GTT Communications, Inc. (NYSE: GTT), the leading global cloud networking provider to multinational enterprises, announced today that CIOReview magazine named GTT one of the “20 Most Promising Networking Solution Providers in 2015.” CIOReview evaluates networking solution providers annually and highlights the results, in a special edition, so CIOs can select the best network provider for their businesses. “Out of hundreds of providers evaluated, GTT is honored to b