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.
GSL
Meaning of GSL in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012