1. Gaddafi, Muanmmar 1
2. Gaitskell, Hugh 1, 2, 3, 4
3. Gardner, Meredith 1
4. GCHQ 1, 2, 3, 4
5. Gee, Ethel 1, 2
6. George VI, King 1
8. George-Brown, Lord 1, 2, 3
9. Germany 1, 2, 3, 4, 5, 6, 7, 8, 9
10. Gibson, Harold ‘Gibby’ 1
11. Gold, Harry 1, 2
12. Goleniewski, Michal 1, 2, 3, 4
13. Golitsin, Anatoli 1, 2, 3, 4, 5, 6, 7, 8
    1. and CIA 1, 2
    2. and Crabb 1, 2
    3. and Gaitskell 1
    4. and Petrov 1
    5. and Popov 1, 2
    6. and Vassall 1, 2, 3
14. Gorski, Anatoli ‘Henry’ 1, 2, 3, 4, 5, 6, 7, 8, 9
15. Gouzenko, Igor 1, 2, 3, 4, 5, 6
    1. and Canada 1, 2, 3, 4
    2. and Hollis 1
16. Green, Michael 1
17. Greenglass, David 1
18. Gribanov, Gen. Oleg 1, 2, 3, 4
19. Gromyko, Andrei 1, 2
20. GRU (Soviet military intelligence) 1, 2, 3, 4, 5, 6, 7, 8, 9
21. Guillaume, Guenther 1, 2
22. Gusev, Feodor 1