I have a WRX Hawkeye but she who must be obeyed has a Classic GL.My OBDII code reader will not work on the latter.Is there an 'off the shelf' interface which will allow me to use my reader on the GL?

Wotcha and welcome - apologies I don't have the answer to your question but I'm sure someone with the knowledge will be along in a bit

i'm not sure if the one i have can do that;

 

 

Autel AutoLink AL319 Feature:

 

    1. Works on ALL 1996 and newer vehicles (OBD II & CAN)-domestic and import

    2. Features the unique patented One-Click I/M Readiness Key for quick State Emissions readiness check and drive cycle verification

    3. Retrieves generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes, and pending codes

    4. Bright color coded LEDs and built in speaker provide both visual and audible indication for readiness verification

    5. Turns off Malfunction Indicator Light (MIL), clears codes and resets monitors

    6. Easily determines the cause of the Malfunction Indicator Light( MIL)

    7. Views freeze frame data

    8. Displays DTC definitions on the TFT color screen

    9. Displays monitor and I/M readiness status (emissions)

    10. Reads live PCM datastream

    11. Retrieves vehicle information(VIN, CIN and CVN)

    12. Multilingual menu and DTC definitions- English, Spanish and French, etc

    13. Extremely easy to use and highly reliable

    14. Internet updateable and upgradeable
  

    Autel AutoLink AL319 Specification:

    
    Display: TFT color display (220 x 176 dpi)

    Operating Temperature: 0 to 60°C (32 to 140 F°)

    Storage Temperature: -20 to 70°C (-4 to 158 F°)

    External Power: 8.0 to 18.0 V power provided via vehicle battery

    Length\Width\Height: 117 mm (4.61”) \72 mm (2.83”)\18 mm (0.71”)

    Main Unit Weight: 0.18kg (0.39lb, without wire) or 0.21 kg (0.46lb, with wire)

 

 

autel_al319.pdf

Again I can't help with that one I'm afraid but welcome to S.O.C