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In the context of the nucleon spin structure, the contribution from the gluons plays an important role. The so-called gluon polarisation can be determined in DIS through the Photon-Gluon Fusion (PGF) process. In the COMPASS experiment, data were collected with a naturally polarised 160 GeV/c muon beam, impinging on a longitudinally polarised nucleon target. Two analyses aiming at the extraction of the gluon polarisation were performed. One is based on the identification of open charm events and the other on the selection of events with high-pT hadron pairs. The final results for the gluon polarisation from these analyses were obtained in LO approximation. For the open charm data an analysis in NLO was also performed. In the case of high-pT events, for the first time, the results are extracted in 3 xg bins. Also A 2h asymmetries were recently evaluated in 2-dimensional bins of x and p 2 . In both analyses, a weighted method based on a neural network

Gluon polarisation results from the COMPASS experiment