File Extension FRL File Format GP- Forth Library FRL stands for GP- Forth Library. 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 GP Smartlist Install I would like to preconfigure and roll out XP mode on 7. What is model library in SYNON?