import groovy.sql.Sql

this.class.classLoader.rootLoader.addURL(new URL('file:.../jtds-1.2.2.jar'))
def driver = 'net.sourceforge.jtds.jdbc.Driver'
def dburl = "jdbc:jtds:sqlserver://ITSVIL:1433/IKALM_APP"
def first
Sql.withInstance(dburl, '.....', '.....', driver) {
    sql ->
        first = sql.firstRow( "SELECT * FROM PROJECT" )
}

import groovy.sql.Sql

defaultTasks 'queryTest'

buildscript {
    dependencies {
        classpath files('..../jtds-1.2.2.jar')
    }
}

task queryTest () {

    // l'update va su REPOSITORYURL + '/' + alm.project.vcrProjectName + '/' + Reference

    doLast {

        def driver = 'net.sourceforge.jtds.jdbc.Driver'
        def dburl = "jdbc:jtds:sqlserver://ITSVIL:1433/IKALM_APP"
        def first
        Sql.withInstance(dburl, 'EY00018', 'IknAlm18', driver) {
            sql ->
                first = sql.firstRow( "SELECT * FROM PROJECT" )
        }
    }
}

Execution failed for task ':queryTest'.
> java.sql.SQLException: No suitable driver found for jdbc:jtds:sqlserver://ITSVIL:1433/IKALM_APP