Dozens of retailers are being kicked out of their shops in the historic GPO building to make room for a major international retailer.

The owner of the $81 million GPO centre, the Industry Superannuation Property Trust, confirmed on Wednesday that the "majority" of retailers in the centre would be asked to move out over the next six months. However, ISPT chief executive Daryl Browning would not confirm who would be moving into the building, which has been plagued with vacancy and foot traffic problems since it opened in 2004.

Retailers are uncertain whether they will be adequately compensated for having their lease agreements broken. Credit:Pat Scala

"It will continue to be in retail use. That's all I can say," Mr Browning said.

Industry sources told Fairfax Media that the prized new tenant was most likely technology giant, Apple. However, there is also speculation it could be Swedish fashion chain H&M or US retailer Abercrombie & Fitch. H&M announced last week it would open its first Australian shop next year.