GST Technology based in the United Kingdom, developed drawing software in the early 1990's to be a companion to its DTP software. GST Designworks, 1st Design, then PressworksDraw. Software engine was licensed to other distributors using names like, GSP DesignWorks, IMSI TurboDraw, NEBS DesignMagic, WizardWorks CompuWorks Designer.  Later in 2001 GST merged with eGames of Europe to form Greenstreet Software, where they released Greenstreet Draw, 
Drawing software for these titles produce a vector based drawing file format with the .ART extension. Early versions were a binary format with the header
47 53 54 3A 41 52 54 00 starting at byte 16. This is
GST:ART in ascii. Later the software was updated to include OLE support and the file format changed to an OLE2 Microsoft Compound File. The contents of the container have the same header information.
Software & Samples