Locotracteurs Gaston Moyse was a French manufacturer of diesel shunting locomotives. Founded in 1922 by Gaston Moyse, the company closed in the late 1970s.

The company produced numerous shunting locomotives, including the Y 7400

SNCF Class Y 7400

The Y 7400 class of small shunters is France's most numerous with 488 locomotives in the production build. The first 120 were built by Deauville, with further batches built by De Dietrich and Moyse . They have the 0-4-0 wheel arrangement, 150 kW diesel engines and mechanical transmission...

 and Y 8000

SNCF Class Y 8000

The SNCF Class Y 8000 is a class of diesel shunter built between 1977 and 1990.-History and design:The locomotives were developed by SNCF for shunting duties...

 for the French state railways (SNCF

SNCF

The SNCF , is France's national state-owned railway company. SNCF operates the country's national rail services, including the TGV, France's high-speed rail network...

), and classes CP 1020 and CP 1050 for the Portuguese state railways (Comboios de Portugal

Comboios de Portugal

thumb|250px|right|CP suburban trains at São Bento Station in Oporto.CP — Comboios de Portugal, EPE is a state-owned company which operates freight and passenger trains in Portugal...

). and shunters for industrial use in steel works and on other industrial sites.