Take your pick. If you're so smart look them up yourself.
1. gadgeteer
2. gag order
3. galleries
4. garnished
5. garnishee
6. gas meter
7. gasholder
8. gasometer
9. gazetteer
10. gentlemen
11. geomancer
12. germander
13. gladdened
14. glendower
15. glorified
16. go-getter
17. go getter
18. go to bed
19. goddamned
20. godfather
21. godmother
22. goitrogen
23. gondolier
24. gonorrhea
25. goosander
26. graduated
27. gratified
28. gravelled
29. gray area
30. green tea
31. greenweed
32. grenadier
33. grey area
34. groceries
35. groundsel
36. guarantee
37. guillemet
38. gunpowder
39. gunrunner