 Los Angeles, California--Newsfile Corp. - May 17, 2020 - The Schall Law Firm, a national shareholder rights litigation firm, announces the filing of a class action lawsuit against Gulfport Energy Corporation NASDAQ: GPOR Gulfport or the Company for violations of 10b and 20a of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission.Investors who purchased the Companys securities between May 3, 2019 and February 27, 2020, inclusive ... 