“Saul had given Michal his daughter, David’s wife, to Palti.” This is just one more indication that by this time in his life Saul had turned away from God in his heart. Saul may have considered David his enemy, but he was still legally married to Michal and so Saul had no right under the Mosaic Law to give her away. It is clear that by this time in his life Saul had, and/or was influenced by, demons, and demons and demonic people are lawbreakers and defy God. We certainly see that in Saul.
“Gallim.” Gallim is somewhere just south of Gibeah, north of Jerusalem, in the tribal area of Benjamin.