In 2016, the value of his assets was 98.83 million euros, according to Äripää, and he was placed 15th in the list of the rich in Estonia. Gross has supported Estonian rally sports and is a long-term supporter of Ott Tänaku. In addition, he has also supported the Rakvere Town in the NE of Estonia(pop.15,000). Tarva basketball club and other sports organizations operating in Lääne-Virumaa.