EMD GP20:
This page is dedicated to EMD's model GP20. EMD built 260 GP20 units for numerous railroads. No units were built at GMD nor were any export units produced.
Domestic Orders:
| Orig. road numbers | model | EMD serial no. | build date | notes |
| AT&SF 1100-1124 | GP20 | 25573-25597 | 5-7/1960 | |
| AT&SF 1125-1174 | GP20 | 26831-26880 | 8-12/1961 | |
| CB&Q 900-935 | GP20 | 26571-26606 | 2-4/1961 | |
| EMDX 5625-5628 | GP20 | 26107-26110 | 8/1960 | demonstrator; to SP 7234-7237 |
| GN 2000-2011 | GP20 | 25561-25572 | 4/1960 | high hood |
| GN 2012-2017 | GP20 | 25700-25705 | 4/1960 | high hood |
| GN 2018-2024 | GP20 | 26286-26292 | 11/1960 | high hood |
| GN 2025-2034 | GP20 | 26294-26303 | 12/1960 | high hood |
| GN 2035 | GP20 | 26293 | 12/1960 | high hood |
| NYC 6100-6114 | GP20 | 26815-26829 | 7-8/1961 | |
| SP 7200-7223 | GP20 | 27087-27110 | 1-3/1962 | |
| SP 7224-7233 | GP20 | 27345-27354 | 3-4/1962 | |
| SSW 800-809 | GP20 | 26304-26313 | 12/1960-1/1961 | |
| SSW 810-819 | GP20 | 26943-26952 | 12/1961-1/1962 | |
| UP 700-729 | GP20 | 26045-26074 | 7-8/1960 | |
| WP 2001-2006 | GP20 | 25623-25628 | 11/1959 | high hood |
| WP 2007-2010 | GP20 | 26041-26044 | 7/1960 | high hood |