The foundation consists of more than 500 piles, which will support platforms and equipment needed to handle the terminal's operations.
The project is intended to increase the country's capacity to import gas "from global markets and strengthen Poland's role in the regional supply system," Energy Minister Miłosz Motyka said.
Gaz-System said the work was completed on schedule despite difficult weather conditions.
Polish companies are carrying out 97 percent of contracts worth about PLN 1.8 billion (EUR 412 million) for the project's onshore section and are responsible for 72 percent of the offshore work, Gaz-System said.
Construction is progressing on other parts of the project.
A microtunnel linking the offshore facility to the land-based gas network was completed in August, while a pipeline connecting Gdańsk with Gustorzyn passed a technical inspection in September.
The floating terminal is being fitted out at a shipyard in Ulsan, South Korea.
The terminal is designed to handle 6.1 billion cubic metres of gas a year, with commercial operations scheduled to begin in early 2028, according to Gaz-System.
A second regasification unit is planned for 2030.
The project is part of Poland's efforts to strengthen energy security by expanding access to gas from international markets.
(ał)
Source: PAP