After some extensive digging, it appears that Gail Gasram participated in developing Diehard code, which represented a suite of programs for testing random number generators. Furthermore, the project was developed at Florida State University, being supported by a grant from the U.S. National Science Foundation. The exact contribution of Gasram in the development of the Diehard code is unclear, as Peterson (2003) noted in his book that the Diehard was developed by Gasram, but Sidorenko (2007) wrote that the well-known Diehard battery was, in fact, developed by Marsaglia. Yet, in another report it is written: "Gail Gasram wrote a serious of computer
functions for various operating systems to test random numbers" [sic]. Despite some conflicting information, it is most likely that Gasram was involved in the Diehard project.
Indeed, just googling Gail Gasram provides almost no information, except for this quote. I managed to get onto the right trail after using a foreign language and uncommon search engines. If anyone provides more information on Gail Gasram, it would be interesting to learn.