| Year | Date | Historical Events |
| | | Gato sank a coast defense ship. |
| 1940 | Oct 5 | Keel laid down by the Electric Boat Co., Groton, CT. |
| 1941 | Sep 20 | Launched. |
| 1942 | Jan 21 | Commissioned with LCDR. V. G. Myers in command.
|
| | Feb 16 | After shakedown training at New London, CT., Gato departed for Pearl Harbor, HI. via the Panama Canal and San Francisco, CA. |
| | Apr 20 | Gato departed Pearl Harbor. HI. on her 1st war patrol. |
| | May 3 | Gato unsuccessfully attacked an converted aircraft carrier, before being driven away by the fierce depth charging of four destroyers off the Marshalls. |
| | May 24 | Gato was ordered to patrol the western approaches to Midway, taking station 280 miles westward during that historic victory.
|
| | Jun 10 | Gato returned to Pearl Harbor, HI. |
| | Jul 2 | Gato departed on her 2nd war patrol. She patrolled east of the Kurile Islands toward the Aleutian chain. |
| | Aug 15 | Gato obtained four torpedo hits with unconfirmed damage to a ship. |
| | Aug 29 | Gato terminated her patrol at Dutch Harbor, AK. |
| | Sep 23 | Gato's 3rd war patrol included operations off Kiska, then she steamed via Midway Island and Pearl Harbor, HI. to Truk atoll. |
| | Dec 6 | Gato's attack on a convoy was broken off by aerial bombs and a severe depth charge attack by three destroyers. |
| | Dec 23 | Gato terminated her patrol at Brisbane, Australia. |
| 1943 | Jan 13 | Gato departed on her 4th war patrol. |
| | Jan 21 | Gato torpedoed and sank the transport ship Kenkon Maru. |
| | Jan 29 | Gato sank the cargo ship Nichiun Maru. |
| | Feb 15 | Gato sank the cargo ship Suruya Maru. |
| | Feb 26 | Gato terminated her patrol at Brisbane, Australia. |
| | Mar 19 | Gato departed on her 5th war patrol. |
| | Mar 29 | Gato landed an Australian Intelligence party at Toep, Bougainville, and evacuated 27 children, 9 mothers, and 3 nuns, transferring them 31 March to SC-531 off Ramos, Florida Island. |
| | Apr 4 | During a submerged radar attack approach between Tanga and Lihir Islands, she was shaken so violently by three exploding depth charges that she returned to Brisbane, Australia for temporary repairs 11 to 20 April. |
| | May 29 | GATO landed more Australian commandos at Toep Harbor, transported more evacuees to Ramos Island, and then reconnoitered off Tarawa in the Gilbert Islands. |
| | Jun 6 | Gato terminated her patrol at Pearl Harbor, HI. |
| | Jun 10 | Gato was routed onward to the Mare Island Naval Shipyard, Vallejo, CA. for overhaul. |
| | Aug 22 | Gato returned to Pearl Harbor, HI. |
| | Sep 6 | Gato departed on her 6th war patrol, onducted off Truk and Bougainville in the Solomon Islands. |
| | Oct 19 | Gato attacked a convoy, scoring hits for unknown damage to two large cargo ships. |
| | Oct 28 | Gato terminated her patrol at Brisbane. Australia. |
| | Nov 18 | Gato departed on her 7th war patrol which took her north of the Bismarck Archipelago. |
| | Nov 30 | Gato made a coordinated attack with Ray, sinking the cargo ship Columbia Maru.. |
| | Dec 16 | Gato rescued a Japanese soldier from a life-raft. |
| | Dec 20 | Gato attacked a convoy in the Saipan-Massau traffic lanes to sink the cargo ship Tsuneshima Maru and scored damaging hits on another freighter. |
| 1944 | Jan 10 | Gato concluded her patrol at Milne Bay, New Guinea. |
| | Feb 2 | Gato departed Milne Bay to conduct her 8th war patrol in the Bismarck-New Guinea-Truk area. |
| | Feb 15 | Gato sank a trawler off Truk. |
| | Feb 26 | Gato sank the transport Daigen Maru No.3. |
| | Mar 12 | Gato sank the cargo ship Okinoyama Maru No.3. Two other trawlers were destroyed by gunfire. |
| | Apr 1 | Gato returned to Pearl Harbor, HI. |
| | May 30 | On her 9th war patrol, Gato took Vice Admiral Charles A. Lockwood to Midway Island, completed photographic reconnaissance of Woleai Island, and served on lifeguard station for air strikes on Truk 11 to 18 June. |
| | Jun 22 | Gato terminated her patrol at Majuro Atoll. |
| | Jul 15 | Gato was underway on her 10th war patrol taking lifeguard station for the carrier-based air strike on Chichi Jima, during which she rescued 2 aviators. |
| | Sep 2 | Gato returned to Pearl Harbor, HI., then proceeded to Mare Island Naval Shipyard, Vallejo, CA. for overhaul and then returned to Pearl Harbor, HI.
|
| 1945 | Jan 28 | On her 11th war patrol, Gato patrolled the Yellow Sea as a unit of a coordinated attack group which included Jallao (SS-368) and Sunfish (SS-281). |
| | Feb 14 | Gato sank a coast defense ship. |
| | Feb 21 | Gato sank the cargo ship Tairiku Maru. |
| | Mar 1 | Gato returned to Guam, Mariana Islands. |
| | Apr 12 | Gato departed on her 12th war patrol, taking lifeguard station in support of the invasion of Okinawa. |
| | Apr 23 | Gato had a brief contest with two Japanese submarines and narrowly missed destruction as well-aimed torpedoes came close. |
| | Apr 30 | Between 27 and 30 April Gato rescued 10 Army aviators from shallow water near the beaches of Toi Misaki, Kyushu. |
| | Jun 3 | Gato returned to Pearl Harbor, HI. |
| | Jul 8 | On her 13th war patrol, Gato departed for lifeguard station for air strikes on Wake Island and then off the eastern coast of Honshu. |
| | Aug 15 | Gato received word of "Cease Fire", while making an attack approach on a sea truck. |
| | Aug 31 | Gato steamed into Tokyo Bay, remained for the signing of surrender documents on board Missouri 2 September. |
| | Sep 3 | Gato departed Tokoyo Bay via Pearl Harbor, HI. and the Panama Canal to the New York Naval Shipyard. |
| 1946 | Mar 16 | Decommissioned. She served for a number of years as a naval reserve training ship at New York and later at Baltimore, Md. |
| 1960 | Mar 1 | Struck from the Naval Register. |
| | Jul 25 | Gato was sold for scrap to the Northern Metals Co., Philadelphia, Pa.
|