GT_A2STR()       Convert an array into a character string
 GT_ACOMP()       Same as Nantucket/CA supplied AComp() but without the bugs
 GT_FILE2A()      Convert a text file to an array
 GT_ISFILE()      Check a file name is valid
 GT_MEMO()        Display a Memo in a box on the screen
 GT_S2ARR()       Function to convert a Delimited String to an array
 GT_STR2A()       Function to convert a string of data to an array.