MOSCOW, Sept 18 (Reuters) - Russian's gas giant - Gazprom has signed a 12-year deal to supply Ghana National Petroleum Corporation (GNPC), due to start in 2019, with liquefied natural gas, a subsidiary of Gazprom Marketing & Trading Group as reported on Monday.

The agreement is the initial step in a planned series of partnerships between GGLNG and GNPC, with both companies working to develop the infrastructure and services required to manage and market the projected gas flows from the region, Gazprom said.