GLS is an abbreviation for "Global Logistics Services". It refers to the transportation and delivery of goods and products all over the world. Synonyms for GLS would include global freight services, international shipping, and worldwide logistics. These terms all refer to the same concept of moving products and materials across the globe through various means of transportation such as air, sea, or land. Other synonyms may include global trade services, cross-border shipping, and international transport. These words are often used interchangeably and are essential in the world of commerce where businesses rely on efficient and effective transportation of their products to reach customers worldwide.