V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
GSL Graphics Software Labs (AT&T)The Free On-line Dictionary of Computing (30 December 2018):
GSL Grenoble System Language. M. Berthaud, IBM, Grenoble. "GSL Language Reference Manual", M. Berthaud et al, March 1973. "A MOL-Based Software Construction System", M. Berthaud et al, in Machine Oriented Higher Level Languages, W. van der Poel, N-H 1974, pp.151-157.