File Extension GLF File Format Grantleigh Labels GLF stands for Grantleigh Labels. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Network label and documentation Print to Zebra 170xi4 from AS/400 How can I open and print contents of a Smart Label Printer "labels.sll. file?