The deal will see GiG’s iGaming platform technologies power the casino's expansion into Pennsylvania.
Building on their initial partnership, the casino will use the group to lead its second US market entry.
The latest deal is based on a revenue share model and has a minimum duration of four years.
PlayStar says it aims to provide an online experience that is different to other US states; this will be done through personalisation, engagement and customer service that “makes players feel like they are the start of the show."
Currently, Pennsylvania is the US' second-largest iGaming market in terms of revenue. According to the Pennsylvania Gaming Control Board, gaming revenue for 2020 showed iGaming win of $566m.
Per Hellberg, PlayStar Casino CEO, said: "We are delighted to be partnering with GiG to power PlayStar's expansion into Pennsylvania.
"With our preparations firmly underway for our New Jersey launch with GiG, it was a natural progression to leverage that work and replicate our casino offering over the border in Pennsylvania.
“This will mark the second market entrance for PlayStar in the USA with GiG and we're looking forward to launching a casino experience like no other."
Richard Brown, GiG CEO, added: "We are very excited to continue our expansion into the third US state, in particular Pennsylvania that has shown a tremendous amount of growth in the iGaming market in a relatively short time period.
“We also believe the plans PlayStar have, with the customer-centric and product-driven approach, connect very well with GiG's B2B offering and strategy; and we look forward to helping them achieve their ambitions."