The cite doesn't mention gamma ray bursts. It just says:
QUOTE Thus, while VY CMa is unlikely to pr duce an extremely luminous SN IIn like SN 2006tf (Smith et al. 2008), it probably will produce a moderately luminous and long-lasting SN IIn like SN 1988Z, which had detectable CSM interaction for over a decade after explosion
Smith, N., Hinkle, K.H. and Ryde, N., 2009. Red supergiants as potential type IIn supernova progenitors: spatially resolved 4.6 μm CO emission around VY CMa and Betelgeuse. The Astronomical Journal, 137(3), p.3558.
https://iopscience.iop.org/article/10.1088/0004-6256/137/3/3558/pdf
and gamma ray bursts normally need a star of at least 40 solar masses
QUOTE It is apparent that long GRBs arise primarily from a subset of massive (MZAMS≥40 M⊙), moderately metal-poor stars at cosmological redshifts. Although the nearest long GRBs lie at distances of tens to hundreds of megaparsec, we can study individual massive stars within appropriate environments in the Local Group.
See Levan, A., Crowther, P., de Grijs, R., Langer, N., Xu, D. and Yoon, S.C., 2016. Gamma-ray burst progenitors. Space Science Reviews, 202(1), pp.33-78.
https://link.springer.com/article/10.1007/s11214-016-0312-x